µTorrent (or uTorrent; commonly abbreviated as "µT" or "uT") is a free, ad-supported, closed source BitTorrent client owned by BitTorrent, Inc. It is the most widely used BitTorrent client outside China (where Xunlei is more popular.[16]) It gets the "µ"(greek letter "mu") in its name 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 3.2 in Windows 8
Original author(s)
Ludvig Strigeus
Developer(s)
BitTorrent, Inc.
Initial release
September 18, 2005; 7 years ago
Stable release
Microsoft Windows
3.2.3 (Build 28705) [edit] (December 7, 2012; 27 days ago)[1][2]
OS X for Intel
1.8.0 (Build 28575) [edit] (November 20, 2012; 44 days ago)[3][4][5]
OS X for PPC
1.6.5 (Build 27624) [edit] (July 25, 2012; 5 months ago)[3][6][7] [±]
Preview release
Android
1.8 (Beta) (September 6, 2012; 3 months ago)[8]
Linux
3.0 (Server alpha; build 27079) (May 29, 2012; 7 months ago)[9][10]
Microsoft Windows
3.3 (Beta; build 28854) (January 3, 2013; 0 days ago)[11]
3.4 (Alpha; build 28762) (December 14, 2012; 20 days ago)[12]
OS X
1.7.12 (Beta; build 28240) (October 19, 2012; 2 months ago)[13]
[±]
Development status
Active
Written in
C++
Operating system
Android (2.1 and later),[8] Linux(officially supported using Wine;[14]native version in development[15]),Microsoft Windows, OS X (10.5; Intel and PPC)
Size
1.6 MB (Android)
1.49 MB (Linux)
946.39 kB (Microsoft Windows)
2.69 MB (OS X)
Available in
66 languages
Type
BitTorrent client
License
Adware
Website
www.utorrent.com
µTorrent (or uTorrent; commonly abbreviated as "µT" or "uT") is a free, ad-supported, closed source BitTorrent client owned by BitTorrent, Inc. It is the most widely used BitTorrent client outside China (where Xunlei is more popular.[16]) It gets the "µ"(greek letter "mu") in its name 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. The program has received consistently good reviews for its feature set, performance, stability, and support for older hardware and versions of Windows.
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 BitTorrent, Inc.[17] The code has also been employed by BitTorrent, Inc. as the basis for version 6.0 and above of theBitTorrent client, a re-branded version of µTorrent.
µTorrent is available for Microsoft Windows, Mac OS X and Linux.[18] AµTorrent Server is also available for Linux. All versions are written in C++.[19]
Contents
[hide]
1 History
1.1 Early development
1.2 PeerFactor SARL
1.3 Ownership change
1.4 Magnet Link (URI) Support
2 Features
2.1 Size
2.2 Operating system support
3 Revenue
3.1 Conduit Toolbar
3.2 Paid version
3.3 Ads, 2012
4 Pronunciation
5 Contributors
6 Reception
7 Languages
8 Release History
8.1 Windows
8.2 Mac OS X
8.3 Linux
9 See also
10 References
11 External links
[edit]History
[edit]Early development
Out of general discontent with bloatware, Serge Paquet suggested to Ludvig Strigeus that he should make a smaller and more efficient BitTorrent client. Strigeus began to conceptualize the plans for the program's development, which, at the time, did not include making the client feature-rich. After initially working on it for about a month during the last quarter of 2004 (the first build is dated October 17, 2004), mostly during his free time before and after work, Strigeus ceased coding µTorrent for a year. He resumed work on September 15, 2005, and three days later, the first public release (version 1.1 beta) was made available as freeware, and began generating feedback.
[edit]PeerFactor SARL
On March 4, 2006, PeerFactor SARL announced the signing of a six-month contract with Strigeus for the development of "new content distribution applications on the Web."[20] PeerFactor SARL is a relatively new company formed by former employees of PeerFactor, which was a subsidiary of the French anti-piracy organization Retspan.
Ludde stated that his coding for PeerFactor SARL was to use his expertise at optimization of the BitTorrent protocol to create a .dllwhich PeerFactor SARL intended to use as part of a distribution platform for files in a corporate setting.[21] At the time there was some speculation that μTorrent may have been modified to spy on users on Peerfactor's behalf,[20][22] however to date (even following μTorrent's acquisition by BitTorrent, Inc.) no evidence has been produced to support these allegations.
[edit]Ownership change
On December 7, 2006, µTorrent was purchased by BitTorrent, Inc., as it was announced on their official forum.[17]
On September 18, 2007, BitTorrent 6.0 was released, which is a re-branded version of µTorrent. As a result, BitTorrent 6 is closed-source (unlike BitTorrent 5.x and before, which were open source software).
[edit]Magnet Link (URI) Support
Support for Magnet Links (URIs) was added in version 1.8, released on August 9, 2008.[23] Magnet Links were designed as an alternative to traditional tracker torrent files and became popularized when sites such as The Pirate Bay included native support for the format.
[edit]Features
This article is in a list format that may be better presented using prose. You can help by converting this article to prose, if appropriate. Editing help is available. (March 2011)
Features present in µTorrent include:
Streaming of video torrents
Teredo tunneling / IPv6 support
Micro Transport Protocol (µTP) preliminary support as of 1.8.2 with full-support added in 2.0
UPnP support for all versions of Windows, without needing Windows XP's UPnP framework
Protocol encryption (PE)
Peer exchange (PEX) with other BitTorrent clients:
libtorrent and clients based on it like Deluge have full µTorrent PEX support
Transmission and clients based on libTransmission have full µTorrent PEX support
KTorrent has full µTorrent PEX support as of 2.1 RC1
Vuze, formerly Azureus, has full support as of version 3.0.4.3
RSS ("broadcatching")
"Trackerless" BitTorrent support using DHT, compatible with the original BitTorrent client and BitComet
User configurable intelligent disk caching system
Full proxy server support
HTTPS tracker support
Configurable bandwidth scheduler
Localized for 66 languages.[24]
Initial seeding of torrents
Customizable search bar & user interface design.[25]
Configuration settings and temporary files are stored in a single directory, allowing portable use
WebUI: A plugin currently in beta testing that allows µTorrent running on one computer to be controlled from another computer, either across the internet or on a LAN, using a Web browser
A new web user interface, codenamed Falcon, is in development. It supports encrypted sessions and the ability of going through firewalls without port forwarding, while being more complete and easier to start using than its predecessor.[26]
Embedded Tracker: a simple tracker designed for seeding torrents, lacking a web interface or list of hosted torrents. It is not designed for secure or large-scale application.[27]
Quick-resumes interrupted transfers
Versions of µTorrent up to 1.8.5 build 17091[28] can use as little as 14 MB of RAM running on a 486 processor on Windows 95.[29]Unicode support for Windows 95/98/ME, avoiding use of the Microsoft Layer for Unicode which is several times larger than µTorrent. As of March, 2011, newer versions required at least Windows XP or newer.[30] Currently µTorrent requires at least Windows XP.[31]
Two "easter egg" hidden features in the About subsection of Help: clicking the µTorrent logo plays a Deep Note-like sound effect,[32]and typing the letter "t" starts a Tetris-like game called μTris,[32][33][34] which in 2008 was selected as #1 of the "Top 10 Software Easter Eggs" by LifeHacker.[35]
[edit]Size
µTorrent is shipped as a single stand-alone compressed executable file, installed at first run. Recent versions have included the ability to install themselves on first run. Small executable size is achieved by avoiding the use of many libraries, notably the C++ standard library and stream facilities, and creating substitutes written specifically for the program. The executable is then compressed to roughly half of its compiled and linked size using UPX.
[edit]Operating system support
Screenshot of the Mac OS X version of μTorrent (up to 0.9.2)
Screenshot of μTorrent Server viewed in Firefox
µTorrent is available for Microsoft Windows, Mac OS X and Linux.[18]
The first test version for Mac OS X, running on Mac OS X 10.5, was released on 27 November 2008.[36]
On September 2, 2010, the native Linux version of µTorrent Server was released. Firon, an administrator of the µTorrent community forum, said that they had been working on this project for a few months prior to the release as it was the most requested feature for some time. This release is intended for users who are seeking a fast command-line interface basedBitTorrent client with a remote web-based management. They also mentioned that a full featured client with a GUI is a work in progress.[37] He also said: "This is a native Linux port and is known to work on Ubuntu 9.10+, Debian 5+ and Fedora 12+. Others may work, but they are not officially supported. Kernel 2.6.13 or newer required. 64-bit host systems currently have some problems, so 32-bit only for now. For trackers who whitelist, the user agent is "uTorrent/300B(build#)(server)". The peerid is identical to the Windows 3.0 client. They share version numbers because of a common codebase."[37]
Currently μTorrent supports Windows XP or newer and Mac OS X 10.5 or newer
[edit]Revenue
In early versions, Strigeus had built in a web redirection via nanotorrent for search queries entered through the search bar that displayed advertisements in a frame on the web browser. Some users thought this suspicious because tracking could be implemented by recording the IP addresses of those downloading/receiving the advertisements, and the search functionality could easily be used to track user queries through whichever web-interface the client is going through to execute the search. After a short trial period, the advertising was disabled, mitigating possible concerns.[38]
A later version of the software has, instead of ads, a "search all sites" feature, which is a keyword-based search bar that delivers listings of torrent files at different trackers. A frame at the top displays advertisements (server-side) in the browser when the search function is used. In version 1.5, no ads are present in the program itself.
Server alpha (3.0 build 27079)
29 May 2012
unknown
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