eMule - eMule is a free peer-to-peer file sharing application for Microsoft Windows.
Kazaa - Kazaa is another peer-to-peer file sharing platform, use FastTrack protocol licensed by Joltid Ltd and operated as Kazaa by Sharman Network.
Fopnu - Fopnu is P2P File Sharing System. 100% Free, Simple and Easy to Use. Contains NO Spyware and NO Ads.
iMesh - IMesh is a file-sharing and media client platform that was available in more than nine different languages.
Soulseek - Soulseek® is a unique ad-free, spyware free, and just plain free file sharing application.
DC++ - DC++ developed by Jacek Sieka.