eMule - eMule is a free peer-to-peer file sharing application for Microsoft Windows.
WinMX - WinMX is another freeware peer-to-peer file sharing program by Frontcode Technologies only run on Microsoft Windows platforms only.
Soulseek - Soulseek® is a unique ad-free, spyware free, and just plain free file sharing application.
Kazaa - Kazaa is another peer-to-peer file sharing platform, use FastTrack protocol licensed by Joltid Ltd and operated as Kazaa by Sharman Network.
Shareaza - Shareaza is the most luxurious and sophisticated file sharing system you'll find.
Gigatribe - Gigatribe is a p2p software with more than 1 Million users.