itTorrent is a communications protocol of peer-to-peer file sharing ("P2P") which is used to distribute data and electronic files over the Internet. Developed by BitTorrent, Inc.
License: Freemium
Shareaza is a peer-to-peer file sharing client running under Microsoft Windows which supports the gnutella, Gnutella2 (G2), eDonkey, BitTorrent, FTP, HTTP and HTTPS network protocols and handles magnet links, ed2k links, and the now deprecated gnutella and Piolet links. Developed by Shareaza Development Team
License: Open Source
BitTorrent is a well-established protocol known for its speed and efficiency in handling large files, while Shareaza offers a versatile platform that supports multiple file-sharing protocols but may lack the same level of user adoption and advanced features.