qBittorrent - Lightweight and open source torrent client that runs on all major platforms.
eMule - eMule is a free peer-to-peer file sharing application for Microsoft Windows.
Deluge - Deluge is a full-featured BitTorrent client for Linux, Unix and Windows.
Fopnu - Fopnu is P2P File Sharing System. 100% Free, Simple and Easy to Use. Contains NO Spyware and NO Ads.
BitTorrent - BitTorrent is a peer-to-peer program developed by Bram Cohen and BitTorrent, Inc.
Shareaza - Shareaza is the most luxurious and sophisticated file sharing system you'll find.