Vuze

Vuze (formerly Azureus) is a Java-based BitTorrent used for file sharing. The program's logo is the Blue Poison Dart Frog (Dendrobates azureus). The Azureus name was given to the project by co-creator Tyler Pitchford, who uses the Latin names of poison dart frogs as "nickname" for his development projects.
Azureus was first released in June 2003 at SourceForge.net. It is now one of the most popular BitTorrent clients
License.
Since version 2.5.0.4, Azureus was distributed under the GNU General Public License (GPL).