Vuze

Formerly Azureus, Vuze builds on the BitTorrent foundation, but with the added perks of social-networking and sleek design. Vuze features many of the file-sharing features you are accustomed to: XML torrent options, IP filters, firewall tests, UPnP plug-ins, and more, but also features a familiar iTunes-like interface for easy navigation and an emphasis on personalization. Vuze also features a built-in HD player for high quality video playback.