BitTorrent is a tool for copying files from one machine to another. FTP punishes sites for being popular. Since all uploading is done from one place, a popular site needs big iron and big bandwidth. With BitTorrent, clients automatically mirror files they download, making the publisher's burden almost nothing.
Osprey is a peer-to-peer enabled content distribution system. It is a metadata management system for software and document collections which enables local and distributed searching of materials. Items are available for download directly via an URL or indirectly via the BitTorrent peer-to-peer protocol. Two components exist: the Osprey Web application and permaseed (permanent seed). The Web application includes metadata management for finding and exploring available content, as well as a BitTorrent tracker.