DistribuStream is a fully open peercasting system, allowing on-demand or live streaming media to be delivered at a fraction of the normal cost. Content is distributed using segmented downloading similar to BitTorrent, but provided in-order so it can be displayed on-the-fly as it is being downloaded.
Spana/Panorama is a protocol and a reference implementation for a new peer-to-peer network with the primary goals of providing anonymity and a robust network. Some of the implemented features are: anonymous file transfers (on both ends) and news (NNTP), RSA-based virtual identities for file authentication, advanced file indexing for searching (such as on bit rates), and automatically resumed downloads from multiple hosts using cryptographically strong checksums on files (cf. heuristics based on filenames) for security and flexibility.
Torrent Swapper is a sociable peer to peer file-sharing client based on the BitTorrent protocol. It has a basic understanding of human friendships, of user tastes in content, and of Internet connectivity between users. Torrent Swapper boasts unique features like Amazon-like recommendations to get interesting files, doubling the download speed by using the upload capacity of friends, real-time P2P file sharing with P2P video streaming, and showing the locations of seeders and leechers of the same content with city-level accuracy on a world map.