Azureus Vuze is a BitTorrent client. Like other BitTorrent clients, it is used to transfer files via the BitTorrent protocol, a mechanism for peer-to-peer file sharing over a network. Azureus is written in Java programming language .
In 2003, the core developers of Azureus formed a company called Vuze, Inc. (formerly Azureus, Inc.) Vuze, Inc. offers legal downloads of content over the BitTorrent network, some free and some for sale and protected by WMV DRM.




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 codenames for his development projects.
Azureus was first released in June 2003 at SourceForge.net, mostly to experiment with the Standard Widget Toolkit from Eclipse. It is now one of the most popular BitTorrent clients. Released under the GNU General Public License, Azureus is free software, though parts of the recently added Vuze platform carry more restricted licensing terms.