uTorrent 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.

Shareaza is a file sharing system that 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).

LimeWire is a fast P2P file-sharing application, letting users share and search for all types of computer files, including movies, pictures, games, and text documents. The application's other features include dynamic querying, the ability to preview files while downloading, advanced techniques for locating rare files, and an extremely intuitive user interface.

iMesh is the latest version of the popular peer-to-peer file-sharing program that lets you find, download, share, and publish audio and video files, computer games, images, photos, and just about any document.

eMule is a filesharing client which is based on the eDonkey2000 network but offers more features than the standard client.

DC++ is an free open-source, ad and spyware-free client, written in C++ for the Direct Connect protocol originally developed by John Hess, that allows you to share files over the internet with other users.

Cabos is an open source Gnutella file sharing program based on LimeWire and Acquisition. It is free software, with no spyware and no adware. Guaranteed.

BitComet is a p2p file-sharing freeware fully compatible with Bittorrent, which is one of the most popular p2p protocol designed for high-speed distribution of 100MB or GB sized files. BitComet is a powerful, clean, fast, and easy-to-use bittorrent client. It supports simultaneous downloads, download queue, selected downloads in torrent package, fast-resume, chatting, disk cache, speed limits, port mapping, proxy, ip-filter, etc.

BearShare is a leading file sharing program. Intuitive design, millions of users, safety features and quick setup - what more could you ask for? How about Free exclusive BearShare music, help with common questions and Free tools!

BearShare Lite removes the bundled software and a cleaner, simpler user experience.

Azureus is a java bittorrent client offering multiple torrent downloads, queuing/priority systems (on torrents and files), start/stop seeding options and instant access to numerous pieces of information about your torrents.