µTorrent is an efficient and feature rich BitTorrent client for Windows sporting a very small footprint. µTorrent was designed to use as little cpu, space and memory as possible while offering all the functionalites expected from advanced clients. With BitTorrent, you can download files faster and contribute by sharing files and bandwidth. Most of the features present in other BitTorrent clients are present in µTorrent, including bandwidth prioritization, scheduling, RSS auto-downloading and Mainline DHT (compatible with BitComet). Additionally, µTorrent supports the Protocol Encryption joint specification (compatible with Azureus 2.4.0.0 and above, BitComet 0.63 and above) and peer exchange.

µTorrent was written with efficiency in mind. Unlike many torrent clients, it does not hog valuable system resources – typically using less than 6MB of memory, allowing you to use the computer as if it weren’t there at all. Additionally, the program itself is contained within a single executable less than 270 KB in size.

Various icon, toolbar graphic and status icon replacements are available, and creating your own is very simple. µTorrent also has support for localization, and with a language file present, will automatically switch to your system language. If your language isn’t available, you can easily add your own, or edit other existing translations to improve them!

The developer puts in a lot of time working on features and making things more user-friendly. Releases only come out when they’re ready, with no schedule pressures, so the few bugs that appear are quickly addressed and fixed.

Features of “µTorrent”:
• Multiple simultaneous downloads
• Smart bandwidth usage
• File level priorities
• Configurable bandwidth scheduling
• Global and per-torrent speed limiting
• Quickly resumes interrupted transfers
• UPnP support (WinXP only)
• Supports popular protocol extensions
• Trackerless support (Mainline DHT)
• Localized to different languages
• Typical memory use less than 6 MB
• Incredibly small: about 275 KB

Changes in Version 1.8.2 (build 15227), 2009-04-23:
- Change: installer increases the Ask rollout to 10%
- Change: If the toolbar download fails, it retries to download it from “download.utorrent.com/offers/…”. It only retries once.

Changes in Version 1.8.3 (build 15289), 2009-04-28:
- Fix: fixed crash when receiving a malformed PEX message
- Fix: evades potential crash when reporting crashdumps
- Fix: crash when parsing some magnet uri components without values
- Fix: crash when starting a torrent in super seed mode and connecting to peers before it’s completely loaded
- Change: Scam site warning in installer

Changes in Version 1.9 (build 14981), 2009-04-01:
- Fix: uTP would not ramp up its rate fast enough
- Change: .torrent association not a factor in displaying the installer
- Fix: remove file association registry keys on uninstall
- Fix: invalid encoding of non-ascii urls in web seeds
- Fix: uTP fix when receiving acks for old packets
- Fix: uTP variable packet size bug
- Change: link to EULA in installer
- Change: added knob to set the uTP target delay (adjusts how hard to push uTP uploads)
- Fix: don’t wait indefinitely for trackers and UPnP when shutting down (two new advanced options)

Homepage – http://utorrent.com

Size: 275 KB

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µTorrent 1.9 Build 14981 Alpha
µTorrent 1.8.3 Build 15289 Beta
µTorrent 1.8.2 Build 15227 Stable