gtk-gnutella - gtk-gnutella is a server/client for Gnutella.
BitTorrent - BitTorrent is a peer-to-peer program developed by Bram Cohen and BitTorrent, Inc.
WireShare - WireShare is a fork of the original LimeWire open source project.
Soulseek - Soulseek® is a unique ad-free, spyware free, and just plain free file sharing application.
LimeWire - LimeWire is a free peer-to-peer file sharing platform that is available to use on Windows, Mac OS and Solaris platforms.
Shareaza - Shareaza is the most luxurious and sophisticated file sharing system you'll find.