List Of Free And Open-source Software Packages

This is a list of free and open-source software (FOSS) packages, computer software licensed under free software licenses and open-source licenses. Software that fits the Free Software Definition may be more appropriately called free software; the GNU project in particular objects to their works being referred to as open-source. For more information about the philosophical background for open-source software, see free software movement and Open Source Initiative. However, nearly all software meeting the Free Software Definition also meets '' the Open Source Definition'' and vice versa. A small fraction of the software that meets either definition is listed here. Some of the open-source applications are also the basis of commercial products, shown in the List of commercial open-source applications and services.

Artificial intelligence

General AI

* OpenCog – A project that aims to build an artificial general intelligence (AGI) framework. OpenCog Prime is a specific set of interacting components designed to give rise to human-equivalent artificial general intelligence.

Large language models

* DeepSeek - R1 reasoning model released as an open-source artificial intelligence project on January 20, 2025.

* DBRX - Open source LLM

* GPT-J - LLM with 6 billion parameters developed by the nonprofit EleutherAI

* GPT-1 - OpenAI LLM released under the MIT License in June 2018

* GPT-2 - OpenAI LLM released under the MIT License in November 2019

* XLNet - Google LLM released as an open source project in June 2019 under the Apache 2.0 license

* BERT - Google LLM released as an open source project in October 2018 under the Apache 2.0 license

* T5 - Google LLM released as an open source project in 2019 under the Apache 2.0 license

Computer vision

* AForge.NET – computer vision, artificial intelligence and robotics library for the .NET framework
* OpenCV – computer vision library in C++

Machine learning

* See List of open-source machine learning software
* See Data Mining below
* See R programming language – packages of statistical learning and analysis tools

Planning

* TREX – Reactive planning

Robotics

* ArduPilot
* CoppeliaSim
* Gazebo
* Mobile Robot Programming Toolkit
* OpenRTM-aist
* Paparazzi Project
* Player Project
* Python Robotics
* Robot Operating System (ROS)
* TurtleBot
* Webots – Robot simulator

Assistive technology

Speech (synthesis and recognition)

* CMU Sphinx – Speech recognition software from Carnegie Mellon University
* Emacspeak – Audio desktop
* ESpeak – Compact software speech synthesizer for English and other languages
* Festival Speech Synthesis System – General multilingual speech synthesis
* Modular Audio Recognition Framework – Voice, audio, speech NLP processing
* NonVisual Desktop Access – (NVDA) Screen reader, for Windows
* Text2Speech – Lightweight, easy-to-use Text-To-Speech (TTS) Software

Other assistive technology

* Dasher – Unique text input software
* Gnopernicus – AT suite for GNOME 2
* Virtual Magnifying Glass – A multi-platform screen magnification tool

CAD

* Archimedes (CAD)
* Art of Illusion
* Blender
* BRL-CAD – a constructive solid geometry (CSG) solid modeling computer-aided design (CAD) system.
* FreeCAD – Parametric 3D CAD modeler with a focus on mechanical engineering, BIM, and product design.
* HeeksCAD
* LibreCAD – 2D CAD software using AutoCAD-like interface and file format.
* MakeHuman
* MeshLab
* Open Cascade Technology (OCCT) – a CAD kernel for 3D CAD, CAM, CAE, etc.
* OpenSCAD – A scripting-based 3D CAD software.
* QCAD
* SolveSpace – 2D and 3D CAD, constraint-based parametric modeler with simple mechanical simulation abilities.
* Sweet Home 3D
* Wings 3D

Computer-aided engineering (CAE)

* Advanced Simulation Library
* ASCEND
* DWSIM
* Elmer FEM solver
* Gmsh
* LibreCAD
* MapleSim
* Modelica
* OpenSim
* OpenFOAM
* Project Chrono
* Salome
* SimScale
* SU2 code

Computer-aided manufacturing (CAM)

Subtractive

* LinuxCNC
* FreeCAD
Path Workbench

Additive Manufacturing

* Cura
* Slic3r
* MeshLab
* OctoPrint
* Marlin
* Klipper
* Repetier-Host
* AstroPrint

Electronic design automation (EDA)

*Electric
* FreePCB
* Fritzing – a CAD software for the design of electronics hardware to build more permanent circuits from prototypes
* gEDA
* GNU Circuit Analysis Package (Gnucap)
* Icarus Verilog
* KiCad – a suite for electronic design automation (EDA) for schematic capture, PCB layout, manufacturing file viewing, SPICE simulation, and engineering calculation
* KTechLab
* Magic (software), Magic
* Ngspice
* pcb-rnd
* Oregano (software), Oregano
* Quite Universal Circuit Simulator (QUCS)
* Verilator
* XCircuit

Computer simulation

* Blender – 3D computer graphics software toolset used for creating Animation, animated films, visual effects, art, 3D printing, 3D printed models, and motion graphics.
* FreeCAD, FreeCad, equivalent of Blender, towards to mechanical engineering
* OpenFOAM – open-source software used for computational fluid dynamics (or CFD).
* FlightGear ''-'' atmospheric and orbital flight simulator with a flight dynamics engine (JSBSim) that is used in a 2015 NASA benchmark to judge new simulation code to space industry standards.
* SimPy – Queue-theoretic event-based simulator written in Python (programming language), Python
* Salome – a generic platform for Pre- and Post-Processing for numerical simulation

Cybersecurity

Antivirus

*ClamAV – cross-platform Antivirus software, antimalware toolkit written in C (programming language), C and C++, able to detect many types of malware including Computer virus, viruses
*ClamWin – free and open-source Antivirus software, antivirus tool for Windows and written in C, C++
*Lynis – Security Information security audit, audit tool (set of Shell script, shell scripts) for Unix and Linux

Data loss prevention

*MyDLP

Data recovery

*dvdisaster
*ddrescue
*Foremost (software), Foremost
*PhotoRec
*TestDisk

Forensics

*The Coroner's Toolkit
*The Sleuth Kit

=Anti-forensics

=

*USBKill
*Tails (operating system), Tails
*BusKill

Disk erasing

*Darik's Boot and Nuke, DBAN
*Srm (Unix), srm

Encryption

*Bouncy Castle (cryptography), Bouncy Castle
*GnuPG
*GnuTLS
*KGPG
*NaCl (software), NaCl
*OpenSSL
*Seahorse (software), Seahorse
*Signal (messaging app), Signal
*stunnel
*TextSecure
*wolfCrypt
*7-Zip

Disk encryption

*dm-crypt
*FreeOTFE and FreeOTFE Explorer
*eCryptfs
*VeraCrypt

Firewall

*Firewalld
*Uncomplicated Firewall (ufw)
*Firestarter (firewall), Firestarter
*IPFilter
*ipfirewall, ipfw
*iptables
*nftables
*M0n0wall
*PeerGuardian
*PF (firewall), PF
*pfSense
*OPNsense
*IpTables Rope, Rope
*Shorewall
*SmoothWall
*Vyatta
*VyOS

Network and security monitoring

*Snort (software), Snort – Network intrusion detection system (IDS) and intrusion prevention system (IPS)
*OpenVAS – software framework of several services and tools offering Vulnerability (computing), vulnerability scanning and vulnerability management

Secure Shell (SSH)

*Cyberduck – macOS and Windows client (since version 4.0)
*Lsh – Server and client, with support for Secure remote password protocol, SRP and Kerberos (protocol), Kerberos authentication
*OpenSSH – Client and server
*PuTTY – Client-only

Password management

*Bitwarden
*KeePass
*KeePassXC (multiplatform fork able to open KeePass databases)
*Password Safe
*Mitro
* Pass (software), Pass

Other cybersecurity programs

Data storage and management

Disk cleaning utilities

* BleachBit

Backup software

Database management systems (including administration)

* Apache Cassandra – A NoSQL database from Apache Software Foundation offers support for clusters spanning multiple datacenter
* Apache CouchDB – A NoSQL database from Apache Software Foundation with multi-master replication
* MariaDB – A community-developed relational database management system with pluggable storage engines and commercial support
* PostGIS – Adds support for geographic objects to the :PostgreSQL, PostgreSQL as per Open Geospatial Consortium (OGC)
* :PostgreSQL, PostgreSQL – A relational database management system emphasizes on extensibility and SQL compliance and available for Microsoft Windows, Windows, Linux, FreeBSD, and OpenBSD

Data mining

*Environment for DeveLoping KDD-Applications Supported by Index-Structures (ELKI) – Data mining software framework written in Java (programming language), Java with a focus on clustering and outlier detection methods
*FrontlineSMS – Information distribution and collecting via text messaging (Short Message Service, SMS)
*KNIME, Konstanz Information Miner (KNIME)
*OpenNN – Open-source neural network software library written in C++
*Orange (software) – Data visualization and data mining for novice and experts, through visual programming or Python scripting. Extensions for bioinformatics and text mining
*RapidMiner – Data mining software written in Java, fully integrating Weka, featuring 350+ operators for preprocessing, machine learning, visualization, etc. – the ''prior'' version is available as open-source
*Scriptella ETL – Extract transform load, ETL (Extract-Transform-Load) and script execution tool. Supports integration with J2EE and Spring. Provides connectors to CSV, LDAP, XML, JDBC/ODBC, and other data sources
*Weka (machine learning), Weka – Data mining software written in Java featuring machine learning operators for classification, regression, and clustering
*JasperSoft – Data mining with programmable abstraction layer

Data Visualization Components

*ParaView – Plotting and visualization functions developed by Sandia National Laboratory; capable of massively parallel flow visualization utilizing multiple computer processors
*VTK – Toolkit for 3D computer graphics, image processing, and visualisation.

Digital Asset Management software system

Disk partitioning software

* GParted
* FIPS (computer program)
* TestDisk

Enterprise search engines

*ApexKB, formerly known as Jumper
*Lucene
*Nutch
*Solr
*Xapian

ETLs (Extract Transform Load)

*KNIME, Konstanz Information Miner (KNIME)
*Pentaho

File archivers

* PeaZip
* 7-Zip

File systems

*OpenAFS – Distributed file system supporting a very wide variety of operating systems
*Tahoe-LAFS – Distributed file system/Cloud storage system with integrated privacy and security features
*CephFS – Distributed file system included in the Ceph storage platform.

Desktop publishing

*Collabora Online Draw and Writer – Enterprise-ready edition of LibreOffice accessible from a web browser. The Draw application is for flyers, newsletters, brochures and more, Writer has most of the functionality too.
*Scribus – Designed for layout, typesetting, and preparation of files for professional-quality image-setting equipment. It can also create animated and interactive PDF presentations and forms.
*LyX – A "What You See Is What You Mean" document creation system, LyX makes use of the LaTeX markup macro system for TeX, allowing the elegant creation of documents which match up with the layouts in it for various document classes.

E-book management and editing

* Calibre (software), Calibre – Cross-platform suite of ebook software
*Collabora Online Writer – Enterprise-ready edition of LibreOffice accessible from a web browser. Allows exporting in the EPUB format.
*Sigil (application), Sigil – Editing software for e-books in the EPUB format

Education

E-learning, learning support

*ATutor – Web-based Learning Content Management System (LCMS)
*Canvas (LMS), Canvas LMS – Web-based, open, extensible learning management system
*Chamilo – Web-based e-learning and content management system
*Claroline – Collaborative Learning Management System
*DoceboLMS – SAAS/cloud platform for learning
*EFront (eLearning software), eFront – Icon-based learning management system
*H5P – Framework for creating and sharing interactive HTML5 content
*IUP Portfolio – Educational platform for Education in Sweden, Swedish schools
*ILIAS – Web-based learning management system (LMS)
*Moodle – Free and open-source learning management system
*OLAT – Web-based Learning Content Management System
*Omeka – Content management system for online digital collections
*openSIS – Web-based Student Information and School Management system
*Sakai Project – Web-based learning management system
*SWAD (software), SWAD – Web-based learning management system

Academic advising

*FlightPath (software), FlightPath – Academic advising software for universities

Educational suites for children

*Tux Paint – Painting application for 3–12 year olds
*GCompris – Educational entertainment, aimed at children aged 2–10

Language

*Alpheios Project
*Anki (software)
*FirstVoices
*Kiten (program), Kiten

Operating systems

*Linux - Unix-based general use OS
*UberStudent – Linux-based operating system and software suite for academic studies
*MAX (operating system)
*Edubuntu

Mind mapping & others

*Vym (software)
*Compendium (software)
*Gnaural – Brainwave entrainment software

Offline learning & Open data

* Kiwix: A free and open-source offline web browser that allows users download Wikipedia entire content and use for offline learning, later was expanded with repositories for Wikimedia Foundation, public domain texts from Project Gutenberg, many of the Stack Exchange sites, and other resources.
* OpenStreetMap: OpenStreetMap was developed in 2004, it uses Open data and users data input through Crowdsourcing and Web mapping to create a complete and downloadable alternative to other online maps, this allow users to enter data when there is no data available due to lack of governance and economic interest or due lower population of the places mapped

Typing

*KTouch – Touch typing lessons with a variety of keyboard layouts
*Tux Typing – Typing tutor for children, featuring two games to improve typing speed

Engineering

* Advanced Simulation Library
* ASCEND
* Calculix
* CHEMKIN - chemical kinetics
* COCO simulator - chemical Process simulation, process simulator
* CP2K - quantum chemistry and solid-state physics
* DWSIM - chemical Process simulation, process simulator
* General Mission Analysis Tool (GMAT) - space mission analysis
* GNU Octave - List of numerical-analysis software, numerical-analysis
* GROMACS - simulations of proteins, lipids, and nucleic acids.
* JSBSim - flight dynamics Software engine, engine
* LAMMPS - Molecular dynamics
* Open Babel - chemical informatics
* OpenModelica - chemical Process simulation, process simulator
* OpenSees - earthquake engineering
* OpenVSP - parametric aircraft geometry tool
* Pyomo - mathematical optimization
* REFPROP - Reference Fluid Thermodynamic and Transport Properties
* XFOIL - analysis of subsonic isolated airfoils

File formats

2D

Raster graphics, Raster imagery

* .apng - Animated Portable Network Graphics
* .avif - AV1 Image File Format
* .bpg - Better Portable Graphics
* OpenEXR, .exr - OpenEXR
* .fits - Flexible Image Transport System primarily for Astronomy
* Free Lossless Image Format, .flif - Free Lossless Image Format
* .gif - Graphics Interchange Format
* .iff / .lbm - InterLeaved BitMap
* .jng - JPEG Network Graphics
* JPEG, .jpg or .jpeg - Joint Photographic Experts Group
* .jxl - JPEG XL
* .mng - Multiple-image Network Graphics
* Magick Image File Format, .miff / Magick Image File Format, .mi - Magick Image File Format
* Netpbm, .pam, .pbm, .pgm, .ppm, .pnm - Netpbm, Netpbm file formats
* .pgf - Progressive Graphics File
* .png - Portable Network Graphics
* .qoi - QOI (image format), Quite OK Image Format
* .tiff - Tag Image File Format
* Wireless Application Protocol Bitmap Format, .wbmp - Wireless Application Protocol Bitmap Format
* .webp
* .xbm - X BitMap
* XCF (file format), .xcf - GIMP
* .xpm - X PixMap

Vector graphics, Vector imagery

* .cgm - Computer Graphics Metafile
* .eps - Encapsulated PostScript
* .pdf - Portable Document Format
* Precision Graphics Markup Language, .pgml - Precision Graphics Markup Language
* .svg - Scalable Vector Graphics
* Vector Markup Language, .vml - Vector Markup Language, Deprecation, deprecated by Scalable Vector Graphics, SVG.
* Xar (graphics), .xar - Xar (graphics)

3D

*3D Manufacturing Format, .3mf - 3D Manufacturing Format
*Additive manufacturing file format, .amf - Additive manufacturing file format
*Blender (software)#File format, .blend - Blender
*.dae, .dae - COLLADA
*AutoCAD DXF, .dxf - AutoCAD DXF, Drawing Exchange Format, publicly documented format, developers can work with it in open-source projects, though not fully open-source itself.
*.fbx
*.gltf, .gltf/.glb - GlTF, Graphics Library Transmission Format
*RGBE image format, .hdr - Radiance (software), Radiance HDR
*Industry Foundation Classes, .ifc - Industry Foundation Classes
*IGES, .iges - Initial Graphics Exchange Specification
*Wavefront .obj file, .obj - developed by Wavefront Technologies
*OFF (file format), .off - OFF (file format), Object File Format
*.ply - .ply, Polygon File Format
*Radiance (software)#Scene description format, .rad - Radiance (software), Radiance
*ISO 10303-21, .step/.stp
*STL (file format), .stl
*Universal Scene Description, .usd - Universal Scene Description
*VRML, .vrml - Virtual Reality Modeling Language
*.x3d

Video

*Matroska, .mkv - Matroska
*Theora, .ogv - Theora
*VP8, .vp8
*VP9, .vp9
*WebM, .webm

Audio

*Audio Interchange File Format, .aiff - Audio Interchange File Format
*.flac - Free Lossless Audio Codec
*.ogg
*Opus (audio format), .opus
*WAV, .wav

Document & Text

*AsciiDoc, .adoc - AsciiDoc
*EPUB, .epub - Ebook format
*LaTeX, .latex - LaTeX, , macro package built on top of TeX for simplification.
*Markdown, .md - Markdown
*OpenDocument, .odt - OpenDocument
*Rich Text Format, .rtf - Rich Text Format
*TeX, .tex - high-quality typography for mathematical notation, mathematical notation, List of common physics notations, physics, Chemical formula, chemistry, Engineering notation, engineering/scientific notation.
*Texinfo, .texinfo

Web and Interactive Media

*CSS, .css - Cascading Style Sheets
*.html - HyperText Markup Language
*JSON, .json - GeoJSON, JSON-LD, JSON-RPC, JsonML, Smile (data interchange format), Smile, UBJSON.
*MathML, .mml - MathML

Database & Data Storage

*Apache Avro, .avro - Apache Avro
*Chemical Markup Language, .cml - Chemical Markup Language
*Comma-separated values, .csv - Comma-separated values
*Hierarchical Data Format, .hdf5 - Hierarchical Data Format
*.ods - OpenDocument Spreadsheet
*Apache ORC, .orc - Apache ORC
*Apache Parquet, .parquet - Apache Parquet
*Protocol Buffers, .protobuf - Protocol Buffers developed by Google
*.shp - Shapefile
*.sqlite - SQLite
*Tab-separated values, .tsv - Tab-separated values
*.xml - Extensible Markup Language

File managers

Finance

Accounting

* GnuCash – Double-entry book-keeping
* HomeBank – Personal accounting software
* KMyMoney – Double-entry book-keeping
* LedgerSMB – Double-entry book-keeping
* RCA open-source application – management accounting application
* SQL Ledger – Double-entry book-keeping
* TurboCASH – Double-entry book-keeping for Windows

Cryptocurrency

* Bitcoin – Blockchain platform, peer-to-peer decentralised digital currency
* Ethereum – Blockchain platform with smart contract functionality

CRM

* CiviCRM – Constituent Relationship Management software aimed at NGOs
* iDempiere – Business Suite, ERP and CRM
* SuiteCRM – Web-based CRM

ERP

* Adempiere – Enterprise resource planning (ERP) business suite
* OFBiz, Apache OFBiz – A suite of enterprise applications from Apache Software Foundation
* Compiere – ERP solution automates accounting, supply chain, inventory, and sales orders
* Dolibarr – Web-based ERP system
* ERPNext – Web-based open-source ERP system for managing accounting and finance
* ERP5 – Single Unified Business Model based system written with Python (programming language), Python and Zope
* iDempiere – Fully navigable on PCs, tablets and smartphones driven only by a community of supporters
* JFire – An ERP business suite written with Java (programming language), Java and Java Data Objects, JDO
* LedgerSMB – A Double-entry book-keeping, double entry accounting and ERP system written with Perl
* metasfresh – Enterprise resource planning, ERP Software
* Odoo – Open-source ERP, CRM and CMS
* Openbravo – Web-based ERP
* Tryton – Open-source ERP

Human resources

* OrangeHRM – Commercial human resource management

Microfinance

* Mifos – Microfinance Institution management software

Process management

* Bonita Open Solution – Business Process Management

Games

Game engines

* A-Frame (virtual reality framework), A-Frame (VR)
* Adventure Game Studio
* Marathon Trilogy#Modern developments, Alpha One
* Ardor3D
* Babylon.js
* Blend4Web
* Blender Game Engine
* ClanLib
* Cocos2d
* Crystal Space
* Cube Engine
* Cube 2 engine
* Dagor Engine
* Defold
* Delta3D
* Dim3
* DimensioneX Multiplayer Engine
* Adam Saltsman#Flixel, Flixel
* Game Editor
* GDevelop
* Godot (game engine), Godot
* Horde3D
* id Tech 4, id Tech 1-4
* Irrlicht Engine, Irrlicht
* ioquake3
* Jake2
* Java 3D
* jMonkeyEngine
* Kivy (framework), Kivy
* LayaBox#LayaAir, LayaAir
* LibGDX
* Löve (game framework), LÖVE

* Moai (software), Moai
* Monkey X
* MonoGame
* Open 3D Engine
* OGRE
* OHRRPGCE
* ONScripter
* OpenClonk
* OpenMW
* OpenSimulator
* ORX
* Panda3D
* Phaser (game framework), Phaser
* PlayCanvas
* PlayN
* Pygame
* Quake II engine
* Ren'Py
* Solar2D
* Starling Framework
* StepMania
* Stratagus
* Stride (game engine), Stride
* Three.js
* TIC-80
* Torque (game engine), Torque3D
* Turbulenz#Turbulenz engine, Turbulenz engine
* Twine (software), Twine
* Visual Pinball
* Wintermute Engine

Physics engines

* Box2D
* Bullet (software), Bullet
* Cannon.js
* Chipmunk (software), Chipmunk
* Newton Game Dynamics
* OPAL (software), OPAL

* Open Dynamics Engine
* Physics Abstraction Layer
* PhysX, NVIDIA PhysX
* Phyz
* Project Chrono
* Tokamak (software), Tokamak

Shader languages

* ARB assembly language
* Cg (programming language), Cg
* OpenGL Shading Language
* Open Shading Language
* Standard Portable Intermediate Representation

Action

*
*''Nexuiz – First-person shooter.''
*OpenArena – First-person shooter.
*''Red Eclipse – First-person shooter.''
*''Tremulous – First-person shooter.''
*''Unvanquished (video game), Unvanquished – First-person shooter.''
*Xonotic – First-person shooter that runs on a heavily modified version of the Quake engine known as the DarkPlaces engine
*Warsow (video game), ''Warsow'' – First-person shooter fast-paced Shooter game#Arena shooter, arena FPS game that runs on the Qfusion engine

Application layer

*Wine (software), WINE – Allows Microsoft Windows, Windows applications to be run on Unix-like operating systems

Chess

*ChessV
*Fairy-Max
*GNU Chess
*PyChess
*XBoard
*Lichess

Educational games

* GCompris – software suite comprising educational entertainment software for children aged 2 to 10
* Tux, of Math Command
* Tux Paint

Video game emulation

*MAME – Multi-platform emulator designed to recreate the hardware of arcade game systems
*Multi Emulator Super System, MESS – Multi-platform emulator designed to recreate the hardware of video game consoles
*RetroArch – Cross-platform front-end for emulators, game engines and video games
*Snes9x – A Super Nintendo Entertainment System, Super Nintendo emulator
*Stella (emulator), Stella – Atari 2600 emulator
*PCSX-Reloaded, PCSX – A PlayStation emulator designed to recreate the hardware of the original PlayStation (console), PlayStation system
*PCSX2 – A PlayStation 2 emulator designed to recreate the hardware of PlayStation 2 system
*PPSSPP – A PlayStation Portable emulator designed to recreate the hardware of PlayStation Portable system
*Project64 – A Nintendo 64 emulator
*RPCS3 – A PlayStation 3 emulator designed to recreate the hardware of PlayStation 3 system
*Dolphin (emulator) – A GameCube and Wii emulator designed to recreate the hardware of GameCube and Wii systems
*Citra (emulator) – A Nintendo 3DS and Wii emulator designed to recreate the hardware of Nintendo 3DS systems
*Cemu – A Wii U emulator designed to recreate the hardware of Wii U systems
*TIC-80 – virtual machine game engine that mimics the 8-bit computing, 8-bit systems of the 1980s

Music video games

* Frets on Fire

Karaoke

* UltraStar

Rhythm game

*StepMania

Puzzle

*Pingus – Lemmings (video game), ''Lemmings'' alternative with penguins instead of lemmings

Sandbox

*Luanti – An open source voxel game engine

Snake games

*GLtron

Simulation

* Endless Sky – Space trading and combat simulation
* FlightGear – Flight simulator

*OpenTTD – Business simulation game in which players try to earn money via transporting passengers and freight by road, rail, water and air
*SuperTuxKart – Kart racing game that features mascots of various open-source projects

Strategy

*0 A.D. (video game), ''0 A.D.'' – Real-time strategy video game
*Freeciv – Turn-based strategy game inspired by proprietary Sid Meier's Civilization (series), Civilization series
*Glest
*The Battle for Wesnoth – Turn-based strategy video game with fantasy setting

Genealogy

* Gramps (software) – a free and open source genealogy software
* Legacy Family Tree – a freeware genealogy software

Geographic information systems

* QGIS – cross-platform desktop geographic information system (GIS) application to view, edit, and analyse geospatial data

Graphical user interface

Desktop environments

Window managers

Windowing system

Groupware

Content management systems

Wiki software

Healthcare software

Integrated library management software

* Evergreen (software), Evergreen – Integrated Library System initially developed for the Georgia (U.S. state), Georgia Public Library Service's PINES catalog
* Koha (software), Koha – SQL-based library management
* NewGenLib
* OpenBiblio
* PhpMyBibli, PMB
* refbase – Web-based institutional repository and reference management software

Image editor

* Darktable – Digital image workflow management, including RAW photo processing
* digiKam – Integrated photography toolkit including editing abilities
* GIMP – Raster graphics editor aimed at image retouching/editing
* Hugin (software), Hugin – panorama stitching
* Inkscape – Vector graphics editor
* Karbon (software), Karbon – Scalable vector drawing application in KDE
* Krita – Digital painting, sketching and 2D animation application, with a variety of brush engines
* LazPaint – Lightweight raster and vector graphics editor, aimed at being simpler to use than GIMP
* LightZone – Free, open-source digital photo editor software application.
* Luminance HDR – Multi-exposure HDR capture, high dynamic range images
* RawTherapee – Digital image workflow management aimed at RAW photo processing

Maps & Navigation

* OpenStreetMap – open geographic database updated and maintained by a community of volunteers via open collaboration.

Mathematics

* ALTRAN
* FriCAS
* GAP (computer algebra system)
* GiNaC
* gnuplot
* Maxima (software), Maxima
* Mathomatic
* Normaliz
* SageMath
* Singular (software)
* SymPy
* Yacas

Computer algebra systems

* Axiom (computer algebra system), Axiom
* Cadabra (computer program), Cadabra
* Cambridge Algebra System
* CPMP-Tools
* CoCoA
* Erable
* PARI/GP
* Reduce (computer algebra system), Reduce
* Xcas

Cryptography

Physics

Computational electromagnetics

* Meep (software), Meep
* Elmer FEM solver
* Numerical Electromagnetics Code

Computational fluid dynamics

* Code_Saturne
* FEATool Multiphysics
* MFEM
* Nek5000
* Nektar++
* OpenFOAM
* SU2 code

Computational particle physics

* CompHEP
* UrQMD
* APFEL (software), APFEL
* Geant4

Computational astrophysics

* Astropy
* CMBFAST
* GADGET

Monte Carlo method

* CP2K
* EGS (program), EGS
* MCSim
* McStas
* McXtrace
* MPMC
* TARDIS (software), TARDIS

symbolic manipulation systems

* FORM (symbolic manipulation system)

Statistics

* R (programming language), R – Statistics software

Numerical analysis

* Octave (language), Octave – Numerical analysis software
* Scilab – Numerical analysis software

Geometry

* Geogebra – Geometry and algebra
* C.a.R.
* CaRMetal
* DrGeo
* Kig (software), Kig
* KSEG (software), KSEG

Plot (graphics), Plotting software

* Chart.js
* D3.js
* ggplot2
* Graphics Layout Engine
* Gnuplot
* Grace (plotting tool), Grace
* Matplotlib
* Plotly
* PLplot
* PyX
* ROOT
* SciDAVis
* Vega and Vega-Lite visualisation grammars, Vega

Charting

* JFreeChart
* Matplotlib
* R (programming language), R

Mathematical notation software

* AUCTeX
* Apache OpenOffice#Components, Apache OpenOffice Math
* AsciiMath
* Calligra Words#Formula editor, Calligra Words - Formula editor
* GeoGebra
* GNOME LaTeX
* GNU TeXmacs
* Gummi (software), Gummi
* KaTeX
* Kile
* LaTeX
* LibreOffice Math#Included applications in LibreOffice, LibreOffice Math
* LyX

* MathJax
* MathML
* Notepad++
* Overleaf
* TeX
* TeX Live
* Texmaker
* TeXnicCenter
* TeXShop
* TeXstudio
* TeXworks
* Vim (text editor), Vim

Mathematical art software

* Apophysis (software), Apophysis
* Electric Sheep
* Fyre (software), Fyre
* MilkDrop
* openPlaG
* XaoS
* R (programming language), R / R (programming language)#Mandelbrot set, R Mandelbrot sets
* Picogen
* GeoGebra

* Processing (programming language), Processing
* P5.js
* matplotlib
* gnuplot
* Inkscape#Object creation, Inkscape spirograph
* LaTeX- PGF/TikZ
* 3Blue1Brown#Manim, Manim
* D3.js

Spreadsheet

* Collabora Online, Collabora Online Calc – spreadsheet component of the Collabora Online package
* LibreOffice Calc – spreadsheet component of the LibreOffice package
* Gnumeric – spreadsheet program of the GNOME Project
* Calligra Sheets – spreadsheet component of the Calligra Suite in KDE
* Pyspread – spreadsheet which uses Python for macro programming, and allows each cell to contain data, the results of a calculation, a Python program, or the results of a Python program.

Mobile software

* Celestia (Android, iOS)
* Calligra (Android)
* Collabora Online, Collabora Office (Android, ChromeOS, iOS, iPadOS)
* CoMaps (Android, iOS)
* Conversations (software), Conversations (Android)
* F-Droid (Android) – app store and software repository
* I2P (Android) – anonymous network layer (implemented as a mix network) that allows for Internet censorship circumvention, censorship-resistant, peer-to-peer communication.
* Kiwix: Offline web browser that allows users to download the entire content of Wikipedia for offline learning purposes. (Android)
* Krita (Android)
* Linphone (Android, iOS)
* :fr:Monal_(logiciel), Monal (iOS)
* Kali NetHunter#NetHunter App Store, NetHunter App Store (Android) – fork of F-Droid for Kali NetHunter
* OpenVPN (Android, iOS) – virtual private network (VPN) system that implements techniques to create secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities. It implements both Client-server architecture, client and server applications.
* Orbot (Android, iOS) – Free software, free Proxy server, proxy Mobile app, app that provides anonymity on the Internet for users of the Android (operating system), Android and iOS Operating system, operating systems. It allows traffic from apps such as web browsers, email clients, map programs, and others to be routed via the Tor network.
* Organic Maps (Android, iOS)
* OsmAnd (Android)
* Conversations (software)#Quicksy, Quicksy (Android)
* Stellarium (software), Stellarium (Android, iOS)
* Tor Browser – onion-routed browser by The Tor Project, based on Firefox ESR
* VLC media player, VLC (Android, iOS)
* Wikipedia (Android, iOS) – See also: List of Wikipedia mobile applications

Media

Audio editors, audio management

* Audacity (audio editor), Audacity
* Ardour (software) , Ardour: Professional digital audio workstation
* LMMS: Digital audio workstation

CD/USB-writing software

* Brasero (software)
* cdrtools
* K3b
* X-CD-Roast

Flash animation

*Pencil2D – For animations
*SWFTools – For scripting

Game engines

*Blender Game Engine – Discontinued 2019
*Godot (game engine), Godot – Application for the design of cross-platform video games
*MonoGame – C Sharp (programming language), C# framework
*Open 3D Engine, Open3DEngine – Based on Amazon Lumberyard
*Stride (game engine), Stride – (prev. Xenko) 2D and 3D cross-platform game engine originally developed by Silicon Studio

Chess engines

*KnightCap
*Leela Chess Zero – Universal Chess Interface chess engine
*Stockfish (chess), Stockfish – Universal Chess Interface chess engine

Graphics

2D

*Pencil2D – Simple 2D graphics and animation program
*Synfig – 2D vector graphics and timeline based animation
*TupiTube (formerly KTooN) – Application for the design and creation of animation
*OpenToonz – Part of a family of 2D animation software
*Krita – Digital painting, sketching and 2D animation application, with a variety of brush engines
* Blender – Computer graphics software, Blender's Grease Pencil tools allow for 2D animation within a full 3D pipeline.
*mtPaint – raster graphics editor for creating Icon (computing), icons, pixel art

3D

* Blender – Computer graphics software featuring modeling, sculpting, texturing, rigging, simulation, rendering, camera tracking, video editing, and compositing
* FreeCAD
* MakeHuman
*OpenFX (software), OpenFX – Modeling and animation software with a variety of built-in post processing effects
*Picogen – Scenery generator, terrain generator
*Seamless3d – Node-driven 3D modeling software
* Wings 3D – Subdivision surface, subdivision modeler inspired by N-World, Nendo and Mirai (software), Mirai from Izware.

3D rendering

* Aqsis
* Blender (software)#Cycles, Cycles and Blender (software)#EEVEE, EEVEE – Blender rendering
* LuxCoreRender
* MoonRay
* POV-Ray
* Radiance
* Sunflow

Image galleries

* Shotwell (software), Shotwell
* Wikimedia Commons

Image viewers

*Eye of GNOME
*F-spot
*feh (image viewer), feh
*Geeqie
*Gthumb
*Gwenview
*KPhotoAlbum
*Opticks (software), Opticks

Maps

* GeoDa
* GeoServer
* GeoTools
* GRASS GIS
* GvSIG
* ILWIS
* JUMP GIS
* Kosmo (GIS)
* Libre Map Project
* MapWindow GIS

* Mapnik
* MapServer
* Marble (software), Marble
* OpenStreetMap
* OpenLayers
* PostGIS
* QGIS
* SAGA GIS
* uDig
* Whitebox Geospatial Analysis Tools

Multimedia codecs, containers, splitters

Music

Subtitle

* Aegisub
* Gnome Subtitles
* Subtitle Edit

Television

Video converters

*Dr. DivX
*FFmpeg
*MEncoder
*OggConvert

Video editing

*Avidemux
*AviSynth
* Blender
*Cinelerra
*Flowblade
*Kdenlive
*Kino (software), Kino
*LiVES
*Losslesscut, LosslessCut
*Natron (software), Natron
*Olive (software), Olive
*OpenShot
*Open Movie Editor
*Pitivi
*Shotcut
*VirtualDub
*VirtualDubMod
*VLMC#VLMC, VideoLAN Movie Creator

DVD authoring

*DeVeDe
*DVD Flick
*DVDStyler

Screencast

* recordMyDesktop
*Open Broadcaster Software (OBS Studio) – Cross-platform streaming and recording program

Other media packages

*Celtx – Media pre-production software

Ripping

* K9Copy
* Thoggen

Video encoders

*Avidemux
*HandBrake
*FFmpeg
*OggConvert

Video players

*Media Player Classic
*VLC media player
* mpv (media player), mpv

Networking and Internet

Advertising

*Revive Adserver

Communication-related

*Asterisk PBX, Asterisk – Telephony and Voice over IP, VoIP server
*Ekiga – Video conferencing application for GNOME and Microsoft Windows
*Conference XP, ConferenceXP – video conferencing application for Windows XP or later
*:fr:Dino_(logiciel), Dino - XMPP, xmpp client, supporting both OMEMO encryption and Jingle (protocol), Jingle Conference call, Audio/Videotelephony, Video protocol, under Windows, Linux and Berkeley Software Distribution, BSD.
*FreePBX – Front-end and advanced PBX configuration for Asterisk PBX, Asterisk
*FreeSWITCH – Telephony platform
*Gajim – xmpp client
*I2P – anonymous network layer (implemented as a mix network) that allows for Internet censorship circumvention, censorship-resistant, peer-to-peer communication.
*Jami (software), Jami – Cross-platform, peer to peer instant-messaging and video-calling protocol that offers end-to-end encryption and SIP client
*Jitsi – Java (programming language), Java VoIP and Instant Messaging client
*QuteCom – Voice, video, and IM client application
*Enterprise Communications System sipXecs – SIP Communications Server
*Slrn – News client, Newsreader
*Telegram (software), Telegram
*Twinkle (software), Twinkle – VoIP softphone
*Tox (protocol), Tox – Cross-platform, peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption

E-mail

*Amavis – Email content filter
*Claws Mail – Email Client
*Fetchmail – Email Retrieval
*Geary (software), Geary – Email client based on WebKitGTK+
*GNUMail – Cross-platform email client
*Hula (software), Hula – Discontinued mail and calendar project
*K-9 Mail – Android Email Client
*MailScanner – Email security system
*MH Message Handling System – Email Client
*Modest (email client), Modest – Email Client
*Mozilla Mail & Newsgroups – Email Client that was part of the now discontinued Mozilla Application Suite
*Mozilla Thunderbird – Email, news, RSS, and chat client
*POPFile – Cross-platform mail filter
*Roundcube – Web-based IMAP email client
*Sylpheed – Email and News Client
*Sympa – Mailing list management software, MLA software

File transfer

* FileZilla, Filezilla

Grid and distributed processing

*GNU Queue
*HTCondor
*pexec

Instant messaging

IRC Clients

Middleware

*Apache Axis2 – Web service framework (implementations are available in both Java (programming language), Java & C (programming language), C)
*Apache Geronimo – Application server
*Bonita Open Solution – a J2EE web application and java BPMN2 compliant engine
*GlassFish – Application server
*Apache Tomcat – Servlet container and standalone webserver
*JBoss – Application server
*OpenRemote – IoT Middleware
*TAO (software) – C++ implementation of the OMG's CORBA standard
*Enduro/X – C/C++ middleware platform based on X/Open group's XATMI and XA standards

RSS, Atom readers, aggregators

*Akregator – Platforms running KDE
*Liferea – Platforms running GNOME
*NetNewsWire – macOS, iOS
*RSS Bandit – Windows, using .NET framework
*RSSOwl – Windows, macOS, Solaris, Linux using Java SWT Eclipse
*Sage (Mozilla Firefox extension)

Peer-to-peer file sharing

*I2P – anonymous network layer (implemented as a mix network) that allows for Internet censorship circumvention, censorship-resistant, peer-to-peer communication.
*Popcorn Time – Multi-platform, free, and open-source media player
*qBittorrent – Alternative to popular clients such as μTorrent
*Transmission (BitTorrent client), Transmission – BitTorrent client
*Deluge (software), Deluge – BitTorrent client

Portal Server

*Drupal
*Liferay
*Sun Java System Portal Server
*uPortal

Remote access and management

*NX technology, FreeNX
*OpenVPN
*rdesktop
*Synergy (software), Synergy
*Virtual Network Computing, VNC (RealVNC, TightVNC, UltraVNC)
*Remmina (based on FreeRDP)

Routing software

Web browsers

Graphical

*Chromium (web browser), Chromium – web browser using the custom Blink (browser engine), Blink engine from which Google Chrome draws its source code
*Brave (web browser), Brave – privacy-focused web browser based on Chromium browser
*Falkon – web browser based on Blink engine, a KDE project
*Firefox – Mozilla-developed web browser using Gecko (software), Gecko layout engine
*Waterfox – Firefox Fork (software development), fork supporting legacy extensions, 64-bit only
*Pale Moon – a customizable fork of Firefox
*Tor Browser – onion-routed browser by The Tor Project, based on Firefox ESR
*GNOME Web – WebKit-based web browser for the GNOME desktop environment
*Midori (web browser), Midori – Lightweight web browser using the WebKit layout engine
*qutebrowser – keyboard operated Webkit-based browser with Vi (text editor), vi-like keybindings
*SeaMonkey, SeaMonkey Navigator – the SeaMonkey internet suite's web browser
*Surf (web browser), Surf – a minimal Tab (interface), tab-less browser by suckless.org using WebKitGTK
*Firefox Focus – privacy-focused mobile web browser from Mozilla available for Android (operating system), Android and iOS

Text-based

*Lynx (web browser), Lynx – a text-based web browser developed since 1992
*Links (web browser), Links – a Text-based user interface, text-based browser with a Linux framebuffer, framebuffer-based graphical mode
*ELinks – fork of Links with JavaScript support

Webcam

*Cheese (software), Cheese – GNOME webcam application
*Guvcview – Linux webcam application

Webgrabber

*cURL
*HTTrack
*Wget

Web-related

*Apache Cocoon – A web application framework
*Apache Tomcat
*Apache HTTP Server, Apache – The most popular web server
*AWStats – Log file parser and analyzer
*BookmarkSync – Tool for browsers
*Caddy (web server), Caddy – an extensible, cross-platform, open-source web server written in Go.
*Cherokee (web server), Cherokee – Fast, feature-rich HTTP server
*curl-loader – Powerful HTTP/HTTPS/FTP/FTPS loading and testing tool
*Docker (software), Docker – Docker Engine is open-source for Linux only
*FileZilla – FTP
*H2O (web server), H2O – supports HTTP/2, Transport Layer Security, TLS, and HTTP/2 Server Push, server push
*Hiawatha (web server), Hiawatha – Secure, high performance, and easy-to-configure HTTP server
*HTTP File Server – User-friendly file server software, with a drag-and-drop interface
*lighttpd – Resource-sparing, but also fast and full-featured, HTTP Server
*Lucee – CFML application server
*Nginx – Lightweight, high performance web server/reverse proxy and e-mail (IMAP/POP3) proxy
*NetKernel – Internet application server
*Qcodo – PHP5 framework
*Squid (software), Squid – Web proxy cache
*thttpd – designed for simplicity, small memory footprint, and speed
*Vaadin – Fast, Java-based framework for creating web applications
*Varnish (software), Varnish – High-performance web application accelerator/reverse proxy and load balancer/HTTP router
*XAMPP – Package of web applications including Apache HTTP Server, Apache and MariaDB
*Zope – Web application server

Web search engines

*Searx – Self-hostable metasearch engine
*YaCy – P2P-based search engine

Other networking programs

*JXplorer – Lightweight Directory Access Protocol, LDAP client
*Nextcloud – A fork of ownCloud
*OpenLDAP – Lightweight Directory Access Protocol, LDAP server
*ownCloud – File share and sync server
*Wireshark – Network monitor

Office software

Text editors

Spreadsheet software

Office suites

*Apache OpenOffice – The cross platform office productivity suite from Apache Software Foundation (ASF) consists of programs for word processing, spreadsheets, presentation, diagrams and drawings, databases, etc.
*Calligra Suite – The office productivity suite from KDE consists of programs for word processing, spreadsheets, presentation, databases, vector graphics, and digital painting
*Collabora Online – Enterprise-ready edition of LibreOffice, web application, mobile phone, tablet, Chromebook and desktop (Windows, macOS, Linux)
*LibreOffice – The cross platform office productivity suite from The Document Foundation (TDF) consists of programs for word processing, spreadsheets, presentation, diagrams and drawings, databases, etc.
*OnlyOffice#Desktop editors, OnlyOffice Desktop Editors – An open-source offline edition of the Cloud

PDF Editors

*PDFsam Basic edition - A free, open source, platform independent software designed to split, merge, mix, extract pages and rotate PDF files for Windows, Linux, MacOS. Open-source version of their commercial offering.

Operating systems

Be advised that available distributions of these systems can contain, or offer to build and install, added software that is neither free software nor open-source.

* Berkeley Software Distribution, BSD: FreeBSD, OpenBSD, NetBSD, GhostBSD, TrueNAS, MidnightBSD, DragonFly BSD, OPNsense, pfSense, XigmaNAS, among others.
* GrapheneOS
* Kali NetHunter
* Linux: Debian, Ubuntu, Manjaro, Fedora Linux, Fedora, openSUSE, antiX, NixOS, Kali Linux, Kali, Alpine Linux, Alpine, Tails (operating system), Tails, Mageia, Slackware, Gentoo Linux, Gentoo, BlackArch, among others.
* LineageOS: An Android (operating system), android-based operative system for tablets and mobile phones.
* GNU Hurd
* Mobian
* Plasma Mobile
* PostmarketOS
* PureOS
* Ubuntu Touch
* Redox (operating system), Redox OS
* FreeDOS – a free OS compatible with IBM PC DOS and Microsoft's MS-DOS
* ReactOS – an open-source OS intended to run the same software as Windows, originally designed to simulate Windows NT 4.0, later aiming at Windows 7 compatibility. It has been in the development stage since 1996.

Emulation and Virtualization

*AppleWin
*DOSBox – DOS programs emulator (including PC games)
*GNOME Boxes
*Hercules (emulator)
*Kernel-based Virtual Machine
*QEMU
*VirtualBox – Hypervisor#Classification, hosted hypervisor for x86 virtualization

Personal information managers

*Chandler (software), Chandler – Developed by the Open Source Applications Foundation (OSAF)
*KAddressBook
*Kontact
*KOrganizer
*Mozilla Calendar – Mozilla-based, multi-platform calendar program
*GNOME Evolution
*Perkeep – Personal data store for pictures
*Project.net – Commercial project management
*TeamLab – Platform for project management and collaboration

Programming language support

Programming languages

* Ada (programming language), Ada
* Bash (Unix shell), Bash
* C (programming language), C
* C Sharp (programming language), C#
* C++
* Carbon (programming language)
* Chapel (programming language), Chapel
* Clojure
* Crystal (programming language), Crystal
* D (programming language), D
* Dart (programming language), Dart
* Elixir (programming language), Elixir
* Erlang (programming language), Erlang
* F Sharp (programming language), F#
* GNU awk
* GNU Fortran
* Gleam (programming language), Gleam

* Go (programming language), Go
* Hack (programming language), Hack
* Haskell
* IDL (programming language), IDL
* J (programming language), J
* Java (programming language), Java
* JavaScript
* Julia (programming language), Julia
* Kotlin (programming language), Kotlin
* Lua (programming language), Lua
* Marlin
* ML (programming language), ML
* Nim (programming language), Nim
* Perl
* PHP
* Prolog
* Python (programming language), Python

* R (programming language), R
* Racket (programming language), Racket
* Ruby (programming language), Ruby
* Rust (programming language), Rust
* Scala (programming language), Scala
* Shell script, Shell
* SQL
* Swift (programming language), Swift
* Tcl
* TypeScript
* V (programming language), V
* Zig (programming language), Zig

Source code editors

* Acme (Plan 9), Acme
* Arachnophilia
* Atom (text editor), Atom
* Bluefish (software), Bluefish
* Brackets (text editor), Brackets
* Edinburgh Compatible Context Editor, ECCE
* ed (software), ed
* Elvis (text editor), Elvis
* Emacs, GNU Emacs
* Extensible Versatile Editor, Extensible Versatile Editor (EVE)
* FeatherPad
* Geany
* gedit
* GNOME Text Editor
* JED (text editor), JED
* jEdit

* JOVE
* Project Jupyter#Jupyter Notebook, Jupyter Notebook
* Kate (text editor), Kate
* Kile
* Komodo Edit
* KWrite
* Lapis (text editor), Lapis
* Language-Sensitive Editor, Language-Sensitive Editor (LSE)
* Leo (text editor), Leo
* Light Table (software), Light Table
* MicroEMACS
* Mousepad
* Nano (text editor), GNU nano
* Neovim
* Notepad++

* nvi
* SciTE
* Stevie (text editor), Stevie
* Textadept
* Vi (text editor), Vi
* Vile (text editor), vile
* Vim (text editor), vim
* Visual Studio Code
* Xed
* XEmacs
* Zed (text editor), Zed

Compilers and assemblers

* Amsterdam Compiler Kit
* BBC BASIC
* Bigloo
* Blitz BASIC
* BDS C
* CINT
* Chez Scheme
* Chicken (Scheme implementation), Chicken
* Clang
* Clozure CL
* CMU Common Lisp
* Cython
* EiffelStudio
* Embeddable Common Lisp
* FASM
* Free Pascal
* FreeBASIC
* G95
* Gambas
* Gambit (Scheme implementation), Gambit
* GNU Assembler
* GNU Compiler Collection, GCC
* GNU Compiler for Java
* GNU Common Lisp
* GNU Fortran
* GNU Pascal
* GNU Smalltalk
* Glasgow Haskell Compiler, Glasgow Haskell

* High Level Assembly
* IL2CPU
* Ikarus (Scheme implementation), Ikarus
* IronRuby
* javac
* Jikes
* Kawa (Scheme implementation), Kawa
* LCC (compiler), LCC
* LibertyEiffel
* LLVM
* MIT/GNU Scheme
* Mono (software)#Mono-specific innovations, Mono compiler
* Netwide Assembler
* Nuitka
* Numba
* Open64
* PeachPie
* Phalanger (compiler), Phalanger
* Portable C Compiler, Portable C
* Psyco
* Pyjs
* QB64
* ROSE (compiler framework), ROSE
* Roslyn (compiler), Roslyn
* Rust (programming language)#Compiler, rustc
* SCM (Scheme implementation), SCM
* Shed Skin

* Small-C
* Small Device C Compiler, Small Device C
* SmartEiffel
* Stalin (Scheme implementation), Stalin
* Steel Bank Common Lisp
* TenDRA Compiler, TenDRA
* Tiny C Compiler, Tiny C
* Vector Pascal
* Watcom C/C++
* XPL
* YARV
* Yabasic
* York Haskell Compiler, York Haskell
* Zig (programming language)#Compiler, Zig Compiler

Bug trackers

*Bugzilla
*Mantis Bugtracker, Mantis
*Mindquarry
*Redmine
*Trac

Code generators

*Babel (transcompiler), Babel – JavaScript transcompiler
*GNU bison, Bison
*CodeSynthesis XSD – XML Data Binding compiler for C++
*CodeSynthesis XSD/e – Validating XML parser/serializer and C++ XML Data Binding generator for mobile and embedded systems
*Flex lexical analyser – Generates lexical analyzers
*Open Scene Graph – 3D graphics application programming interface
*OpenSCDP – Open Smart Card Development Platform
*SableCC – Parser generator for Java and .NET
*SWIG – Simplified Wrapper and Interface Generator for several languages
*^txt2regex$
*xmlbeansxx – XML Data Binding code generator for C++
*YAKINDU Statechart Tools – Statechart code generator for C++ and Java

Documentation generators

*Doxygen – Tool for writing software reference documentation. The documentation is written within code
*Mkd (software), Mkd – Extracts software documentation from source code files, pseudocode, or Comment (computer programming), comments
*Natural Docs – Claims to use a more natural language as input from the comments, hence its name

Configuration software

*Autoconf
*Automake
*CMake

Debuggers (for testing and trouble-shooting)

*GNU Debugger – A portable debugger that runs on many Unix-like systems
*Memtest86 – Stress-tests random access memory, RAM on x86 machines
*Xnee – Record and replay tests

Integrated development environments

Version control systems

Reference management software

Risk Management

*Active Agenda – Operational risk management and Rapid application development platform

Science

Bioinformatics

* AMAP
* BAli-Phy
* BLAST (biotechnology), BLAST, CS-BLAST, BLAT (bioinformatics), BLAT
* Bowtie (sequence analysis), Bowtie
* Clustal
* DECIPHER (software), DECIPHER
* FASTA
* Fast statistical alignment
* HMMER
* HH-suite
* JAligner

* MAFFT
* MAVID
* MUSCLE (alignment software), MUSCLE
* Nextflow
* Phyloscan
* Probalign
* ProbCons
* Stemloc
* T-Coffee
* UGENE
* Yass (software), Yass

Cheminformatics

* Chemistry Development Kit
* JOELib
* OpenBabel

Chemistry notation

* mhchem

Data science

* Apache Hadoop – distributed storage and processing framework
* Apache Spark – unified analytics engine
* ELKI - data analysis algorithms library
* Jupyter Notebook – interactive computing
* Keras – neural network library
* KNIME – data analytics platform
* Matplotlib – data visualization library
* NumPy – numerical computing library
* Orange (software), Orange – data mining tool
* Pandas (software), pandas – data manipulation library
* Python (programming language), Python
* R (programming language), R – statistical computing language
* SciPy – scientific computing library
* scikit-learn – Python machine learning library
* TensorFlow – machine learning framework
* Weka (software), WEKA – machine learning and data analysis suite

Electronic lab notebooks

* Project Jupyter, Jupyter

Geographic information systems

Geoscience

Grid computing

Microscope image processing

* CellProfiler – Automatic microscopic analysis, aimed at individuals lacking training in computer vision
* Endrov – Java-based plugin architecture designed to analyse complex spatio-temporal image data
* Fiji (software), Fiji – ImageJ-based image processing
* Ilastik – Image-classification and segmentation software
* ImageJ – Image processing application developed at the National Institutes of Health
* IMOD (software), IMOD – 2D and 3D analysis of electron microscopy data
* Insight Segmentation and Registration Toolkit, ITK – Development framework used for creation of image segmentation and registration programs
* KNIME – Data analytics, reporting, and integration platform
* VTK – C++ toolkit for 3D computer graphics, image processing, and visualisation
* 3DSlicer – Medical image analysis and visualisation

Molecular design software

* Ascalaph Designer
* Winmostar

Molecular dynamics

* GROMACS – Protein, lipid, and nucleic acid simulation
* LAMMPS – Molecular dynamics software
* MDynaMix – General-purpose molecular dynamics, simulating mixtures of molecules
*Molecular simulation - ms2, ''ms''2 – molecular dynamics and Monte Carlo simulation package to predict thermophysical properties of fluids
* NWChem – Quantum chemical and molecular dynamics software

Molecule editors

* Ascalaph Designer
* Avogadro (software), Avogadro
* Gabedit
* JChemPaint
* Kekulé Program
* XDrawChem

Molecular graphics systems

* Avogadro (software), Avogadro
* BALL
* Gabedit
* Jmol
* Molekel
* PyMOL
* RasMol

Molecular mechanics modeling

* Avogadro (software), Avogadro
* CP2K
* GROMACS
* LAMMPS
* MDynaMix
* ms2 (software), ms2
* OpenMM
* Orac
* NWChem
* Q (software), Q
* Quantum ESPRESSO

Molecular structure

* Chemfig
* JChemPaint
* XDrawChem
* XyMTeX

Molecule viewer

* Avogadro (software), Avogadro – Plugin-extensible molecule visualisation
* BALLView – Molecular modeling and visualisation
* Jmol – 3D representation of molecules in many formats, for teaching use
* Molekel – Molecule viewing software
* MeshLab – Able to import PDB dataset and build up surfaces from them
* PyMOL – High-quality representations of small molecules and biological macromolecules
* QuteMol – Interactive molecule representations offering an array of innovative OpenGL visual effects
* RasMol – Visualizes biological macromolecules

Nanotechnology

* nanoHUB
* Ninithi – Visualise and analyse carbon allotropes, such as carbon nanotube, Fullerene, graphene nanoribbons

Plotting

*Veusz

Quantum chemistry

* CP2K – Atomistic and molecular simulation of solid-state, liquid, molecular, and biological systems

Screensavers

*BOINC
*Electric Sheep
*XScreenSaver

Simulation software

* List of computer simulation software#Free or open-source, List of free and open source simulation software

Statistics

* R (programming language), R – Statistics software
* LimeSurvey – Online survey system

Theology

Bible study tools

* Go Bible – A free Bible viewer application for Java mobile phones
* Marcion (software), Marcion – Coptic language, Coptic–English language, English/Czech language, Czech dictionary
* OpenLP – A worship presentation program licensed under the GNU General Public License
* The SWORD Project – The CrossWire Bible Society's free software project

Typesetting

Web conferencing

* Jitsi, Jitsi Meet
* OpenMeetings
* Conference XP
* Jami (software), Jami
* BigBlueButton

See also

* Open-source software
* Open-source license
*
*
*
*
*
*
* GNOME Core Applications
* List of GNU packages
* List of KDE applications
* List of formerly proprietary software
* List of Unix commands
* List of open-source hardware projects

General directories

* AlternativeTo
* CodePlex
* Free Software Directory
* Freecode
* Open Hub
* SourceForge

References

External links

Open Source Software Directory (OSSD)
a collection of free and open-source software, FOSS organized by target audience.

List of open-source programs (LOOP) for Windows
maintained by the Ubuntu (operating system), Ubuntu Documentation Project.

The OSSwin Project
a list of free and open-source software for Windows

Apache Project List

Apache Projects DirectorySoftware - GNU Project - Free Software Foundation
*freesoft:Main_Page, Free Software Directory

{{DEFAULTSORT:Open Source Software Packages
Free software lists and comparisons
Lists of software
Software licensing, *