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Peer Exchange
Peer exchange or PEX is a communications protocol that augments the BitTorrent file sharing protocol. It allows a group of users (or peers) that are collaborating to share a given file to do so more swiftly and efficiently. In the original design of the BitTorrent file sharing protocol, peers (users) in a file sharing group (known as a "swarm") relied upon a central computer server called a tracker to find each other and to maintain the swarm. PEX greatly reduces the reliance of peers on a tracker by allowing each peer to directly update others in the swarm as to which peers are currently in the swarm. By reducing dependency on a centralized tracker, PEX increases the speed, efficiency, and robustness of the BitTorrent protocol. Description Users wishing to obtain a copy of a file typically first download a torrent file that describes the file(s) to be shared, as well as the URLs of one or more central computers called trackers that maintain a list of peers currently sharing th ...
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Communications Protocol
A communication protocol is a system of rules that allows two or more entities of a communications system to transmit information via any kind of variation of a physical quantity. The protocol defines the rules, syntax, semantics and synchronization of communication and possible error recovery methods. Protocols may be implemented by hardware, software, or a combination of both. Communicating systems use well-defined formats for exchanging various messages. Each message has an exact meaning intended to elicit a response from a range of possible responses pre-determined for that particular situation. The specified behavior is typically independent of how it is to be implemented. Communication protocols have to be agreed upon by the parties involved. To reach an agreement, a protocol may be developed into a technical standard. A programming language describes the same for computations, so there is a close analogy between protocols and programming languages: ''protocols ar ...
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KTorrent
KTorrent is a BitTorrent client that is part of the KDE Gear. Features KTorrent is often received as a client intended to be feature rich. Features include: *Upload and download speed capping / throttling & scheduling *Internet searching with torrent search engines using KHTML part. *Support for UDP trackers. *IP address blocklist plugin *Port forwarding with UPnP (Universal Plug and Play) * Protocol encryption * DHT (mainline version), and support for trackerless torrents *μTorrent peer exchange (PEX) support *File Prioritization *Ability to import partially downloaded files *Directory scanner to automatically watch directories for new torrents *Manual addition of trackers to torrents *RSS feed support *Web interface plugin with default port number 8080 *IPv6 support *SOCKS v4 and v5 support * μTP support *Generation and parsing of magnet links *UDP tracker scraping *Enhanced usability of the queue manager *Super-seeding support *Streaming of video while downloading See ...
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Transmission (BitTorrent)
Transmission is a BitTorrent client which features a variety of user interfaces on top of a cross-platform back-end. Transmission is free software licensed under the terms of the GNU General Public License, with parts under the MIT License. Features Transmission allows users to quickly download files from multiple peers on the Internet and to upload their own files. By adding torrent files via the user interface, users can create a queue of files to be downloaded and uploaded. Within the file selection menus, users can customise their downloads at the level of individual files. Transmission also seeds, that is, it will automatically share downloaded content. Transmission allows the assigning of priorities to torrents and to files within torrents, thus potentially influencing which files download first. It supports the Magnet URI scheme and encrypted connections. It allows torrent-file creation and peer exchange compatible with Vuze and μTorrent. It includes a built-in web s ...
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RTorrent
rTorrent is a text-based BitTorrent client written in C++, based on the ncurses and libTorrent (not to be confused with libtorrent) libraries for Unix, whose author's goal is "a focus on high performance and good code". Technical details The library differentiates itself from other implementations by transferring data directly between file pages mapped to memory by the mmap() function and the network stack. On high-bandwidth connections, it claims to be able to seed at three times the speed of the official client. rTorrent packages are available for various Linux distributions and Unix-like systems, and it will compile and run on nearly every POSIX-compliant operating system, such as FreeBSD and macOS. rTorrent uses the ncurses library and is suitable for use with GNU Screen or Tmux; it uses commands such as Carriage return to load a torrent, after which ^S can be used to start a torrent (where ^ is shorthand for Ctrl key), backspace can be used to automatically s ...
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Opera (web Browser)
Opera is a multi-platform web browser developed by its namesake company Opera. The browser is based on Chromium, but distinguishes itself from other Chromium-based browsers ( Chrome, Edge, etc.) through its user interface and other features. Opera was initially released on 10 April 1995, making it one of the oldest desktop web browsers still actively developed. It was commercial software for its first ten years and had its own proprietary layout engine, Presto. In 2013, it switched from the Presto engine to Chromium. Opera is available on Windows, macOS, Linux, Android, and iOS (Safari WebKit engine). There are also mobile versions called Opera Mobile and Opera Mini. Opera users also have access to Opera News, a news app based on an AI platform. The company released a gaming-oriented version of the browser, Opera GX, in 2019, and a blockchain-focused Opera Crypto Browser into public beta in January 2022. History In 1994, Jon Stephenson von Tetzchner and Geir Ivarsà ...
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Tixati
Tixati is a proprietary Linux and Windows BitTorrent client written in C++. It has standalone and portable versions with each new client version. Features In addition to standard BitTorrent client-sharing functions, Tixati provides integral chatrooms with channel chat as well as private messaging being encrypted. Chatrooms can be either public or secret. Users are allowed to optionally share lists of magnet or URL links which are then searchable across all channels a user is joined to. Browsing a specific user's share list is also supported. The channels also allow for streaming audio and video media. Fopnu Since July 20, 2017, the developers of Tixati have released regular updates of a new P2P system (network and client) called ''Fopnu''. It's visually similar to Tixati but Fopnu is not a torrent client. Fopnu is a decentralized network with the latest advances in P2P technology, pure UDP and with all communications being encrypted. The ad-free freeware client includes c ...
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μTorrent
μTorrent, or uTorrent (see pronunciation) is a proprietary adware BitTorrent client owned and developed by Rainberry, Inc. with over 150 million users. It is the most widely used BitTorrent client outside China; globally only behind Xunlei. The " μ" (Greek letter " mu") in its name comes from the SI prefix " micro-", referring to the program's small memory footprint: the program was designed to use minimal computer resources while offering functionality comparable to larger BitTorrent clients such as Vuze or BitComet. μTorrent became controversial in 2015 when many users unknowingly accepted a default option during installation which also installed a cryptocurrency miner. The miner was removed in later versions, but had already done irreversible damage to μTorrent's reputation. The program has been in active development since its first release in 2005. Although originally developed by Ludvig Strigeus, since December 7, 2006, the code is owned and maintained by BitT ...
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QBittorrent
qBittorrent is a cross-platform free and open-source BitTorrent client written in native C++. It relies on Boost, Qt 6 toolkit and the libtorrent-rasterbar library (for the torrent back-end), with an optional search engine written in Python. History qBittorrent was originally developed in March 2006 by Christophe Dumez, from the University of Technology of Belfort-Montbéliard (UTBM). It is currently developed by contributors worldwide and is funded through donations, led by Sledgehammer999 from Greece, who became project maintainer in June 2013. Along with the 4.0.0 release a new logo for the project was unveiled. Features Some of the features present in qBittorrent include: * Bandwidth scheduler * Bind all traffic to a specific interface * Control over torrents, trackers and peers (torrents queueing and prioritizing and torrent content selection and prioritizing) * DHT, PEX, encrypted connections, LPD, UPnP, NAT-PMP port forwarding support, µTP, magnet l ...
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Deluge (BitTorrent Client)
Deluge BitTorrent Client is a free and open-source, cross-platform BitTorrent client written in Python. Deluge uses a front and back end architecture where libtorrent, a software library written in C++ which provides the application's networking logic, is connected to one of various front ends including a text console, the web interface and a graphical desktop interface using GTK through the project's own Python bindings. Deluge is released under the terms of the GPL-3.0-or-later license. Features Deluge aims to be a lightweight, secure, and feature-rich client. To help achieve this, most of its features are part of plugin modules which were written by various developers. Starting with version 1.0, Deluge separated its core from its interface, running it instead in a daemon (server/service), allowing users to remotely manage the application over the web. Deluge has supported magnet links since version 1.1.0 released in January 2009. History Deluge was started ...
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Libtorrent
libtorrent is an open-source implementation of the BitTorrent protocol. It is written in and has its main library interface in C++. Its most notable features are support for Mainline DHT, IPv6, HTTP seeds and μTorrent's peer exchange. libtorrent uses Boost, specifically Boost.Asio to gain its platform independence. It is known to build on Windows and most Unix-like operating systems (OS X, Linux, and many BSDs). libtorrent is kept up to date with bittorrent extensions that developers deem most useful, and is actively being optimized to work in a broader set of environments. Many of its features can be disabled at compile-time to not include code that would not be used in a particular use case. It aims to be the most suitable libtorrent implementation for embedded devices as well as desktops and seed-servers. Some of its implementation details are described in the features section. The original author of libtorrent is Arvid Norberg. It is the first client to support the ex ...
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Bitflu
Bitflu is an open-source, BitTorrent client by Adrian Ulrich. It is available for Unix-like systems and is written in Perl. Features * Multiple downloads * IPv6 Support * Designed to run as a daemon/No GUI: You can connect to the client via telnet and/or http (AJAX) * Security: The client can chroot itself and drop privileges * Bandwidth shaping (upload+download) * Crash-Proof design: Crashes or a full filesystem will never corrupt your downloads again :-) * Non-Threading/Non-Forking: All connections are handled in non-blocking state using epoll (or kqueue on *BSD) Reception Bitflu has received good reviews, both in open-source software sites and blogs, praising it for being lightweight and feature-complete. Even so, Bitflu seems to be largely unknown, reportedly commanding only 0.000025% of the total BitTorrent traffic. According to one reviewer, this could be due to its non-automated, relatively elaborated install procedure, which could be putting off a "majority of us ...
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