Azureus is a free Java based BitTorrent client
Edit By BS Editor: Azureus is a Java based BitTorrent client that offers multiple torrent downloads, queuing/priority systems (on torrents and files), start/stop seeding options and Instant Access to numerous pieces of information about your torrents.

Azureus is a BitTorrent client with multiple torrent downloads and instant access to information.

Azureus also features an embedded tracker that is easily set up and ready to use.

New Features:

UI | Added Check Files Exist menu option
Plug | Perform low resource usage tracking of online torrents for swarm cross-population purposes
Changes:

Core | Added option to disable download speed Focus
Core | Reduced Memory Usage for many-torrent instances
UI | Multiple selected torrent export now works you can free download Azureus 3.0 now.