Azureus

Azureus implements the BitTorrent protocol using java language and comes bundled with many invaluable features for both beginners and advanced users:

Multiple torrent downloads Upload and download speed limiting, both globally and per torrent Advanced seeding rules Adjustable disk cache Only uses one port for all the torrents UPnP sets the forward on your router Can use a proxy, for both tracker and peer communications Fast resume Can set a default download dir and move completed files Can import torrents automatically from a set dir Highly customizable interface IRC plugin included for quick help Embedded tracker ([1]), host your own torrents, automate your shares (periodic scanning of a dir)... Distributed Hash Table: host on it a completely decentralised torrent and/or benefit from it when the tracker is offline.

Many useful plugins are available:

Auto-adjustment of your upload and download speeds according to your network charge with Autospeed ([2])

Auto-download torrents with RSS Feed Scanner([3])

Schedule upload and download speed limits with Speed Scheduler ([4])

Receive a mail when a download finishes with Status Mailer ([5])

Add numerous info on torrents (Extra seeding columns ([6]), Country Locator ([7]))

Remote control Azureus through the Swing Web Interface ([8])or the HTML Web Interface ([9])

Can be downloaded here: [10]