BitTorrent
BitTorrent, also known as the "Mainline" client, is developed
and distributed by the company of the same name. It was written in python by
Bram Cohen, who invented and developed the BitTorrent file-sharing protocol.
Because it truly is "official," all the optimizations and updates to the
original BitTorrent code will be reflected in the official client first.
It's cross-platform, with builds for Windows, Mac OS X, Unix and Linux.
Bandwidth management, queuing and network optimization features are all
excellent and easy to use. An integrated torrent search field pulls results
from the engine hosted at BitTorrent.com.
Azureus
If you're looking for a slew of features - then Azureus is for
you. It supports plug-ins, so what it doesn't have can be slapped on after
the fact. It's built in Java, and Azureus can run on any platform where
Java can be installed. Built-in features include advanced bandwidth
management, an embedded tracker, management of files within torrents,
support for trackerless torrents and a connection optimizer that can
traverse firewalls with ease.
µTorrent
The µ is for micro, and "microTorrent" is a very, very tiny
BitTorrent client. The entire application is 170 KB, and it packs enough
features into that small package to compete with beefier applications like
Azureus. The memory footprint is also ridiculously small. Even so, the
client is responsive, fast and can handle a large workload without choking.µTorrent has extensive bandwidth-management tools, support for UPnP and
trackerless torrents, and users can limit downloads to specific files within
torrents. µTorrent also has support for multiple trackers, so you can
download the same torrent from two or more trackers at once. The user
interface is uncluttered and skinnable.
BitComet
BitComet is a BitTorrent/HTTP/FTP download management software,
which is powerful, fast, very easy-to-use, and completely FREE. It contains
many advanced features for BitTorrent download and extends its leading
BitTorrent technology to HTTP/FTP to accelerate downloading up to 5 - 10
times faster, or more.
Get BitComet