A peer-to-peer (P2P) computer network uses diverse connectivity between participants in a network and the cumulative bandwidth of network participants rather than conventional centralized resources where a relatively low number of servers provide the core value to a service or application. below are the list of sofwares which are available free to download:

peer-to-peer free softwares:

BitTorrent is the global standard for delivering high-quality files over the Internet. With an installed base of over 160 million clients worldwide, BitTorrent technology has turned conventional distribution economics on its head. Download Link: http://www.bittorrent.com/download.

BitComet is a cross-protocol BitTorrent, HTTP and FTP client written in C++ for Microsoft Windows and available in 43 different languages.[1] Its first public release was version 0.28. The current BitComet logo has been used since version 0.50. Download Link: http://www.bitcomet.com

LimeWire is a free peer-to-peer file sharing (P2P) client for the Java platform, which uses the Gnutella network to locate files as well as share files. It also has limited BitTorrent support. A freeware version as well as a purchasable "enhanced" version is available. Download Link: http://www.limewire.com/download/

Kazaa Media Desktop is a peer-to-peer file sharing application using the FastTrack protocol and owned by Sharman Networks. Kazaa is commonly used to exchange MP3 music files over the Internet. However it can also be used to exchange other file types, such as videos, applications, and documents. Download Link: http://www.kazaa.com/

Shareaza is a peer-to-peer file sharing client which supports the Gnutella, Gnutella2, eDonkey Network, BitTorrent, FTP and HTTP network protocols and handles magnet links, ed2k links, Piolet links, and the now deprecated Gnutella links. It is available in 30 languages. Download Link: http://shareaza.sourceforge.net/

Ares Galaxy is an open source peer-to-peer file sharing application that uses its own decentralized supernode/leaf network. It was spun-off from the Gnutella network in 2002. Ares Galaxy has a simple, quick access interface with a built in audio/video viewer. The latest versions also support the BitTorrent protocol and Shoutcast radio stations. Download Link: http://aresgalaxy.sourceforge.net/

ANts P2P is an anonymous peer-to-peer open source file sharing software written in Java. The project was launched in 2004, and the code is licensed under the GPL. Download Link: http://sourceforge.net/projects/antsp2p/