Freeware/File Sharing

Name	Description
ABC (Yet Another Bittorrent Client)	ABC is an improved client for the Bittorrent peer-to-peer file distribution solution. ABC is based on BitTornado which extended from from Original Bittorrent Core System.
DC++	DC++ is an open source client for Windows for the Direct Connect network. Direct Connect allows you to share files over the Internet without restrictions or limits. The client is completely free of advertisements and has a nice, easy to use interface. Firewall and router support is integrated and it is easy and convenient to use functionality like multi-hub connections, auto-connections and resuming of downloads.
Shareaza	recommended - Shareaza is the most luxurious and sophisticated file sharing system you'll find. It can harness the power of up to four separate peer-to-peer (P2P) networks, including EDonkey2000, Gnutella, BitTorrent and Shareaza's native network, Gnutella2 (G2). Not only that, but Shareaza is completely FREE and won't show any annoying ads or pop-ups. It won't install any unwanted third party programs that can wreak havoc with your computer. No spyware, no registration, no "paid version". Just download and use. Simple.
µTorrent	µTorrent is an efficient and feature rich BitTorrent client for Windows sporting a very small footprint. It was designed to use as little cpu, memory and space as possible while offering all the functionality expected from advanced clients.