Tribler is a social community that facilitates filesharing through a so called peer-to-peer (p2p) network. Tribler - Defines 4th generation file sharing system with social networking, moderation, tag-based navigation, recommendation, and real-time streaming.

Features:

• Easy downloading - Adds more than simple keyword search, youtube grid
• Recommendation and Friends - See what other people like, related files, find person with the same taste
• Video on Demand - When the download is on its way, you can use the integrated video player to start watching ASAP
• Wealth of content - Search both Bittorrent, Youtube, and Liveleak for content.
• All-in-one interface - No need to hunt down .torrent files on websites, upgrade to the latest Divx codecs, install the Flash plugin.