OFF System!

RetroShare is a open source cross-platform, private and secure decentralized communication system. It lets you to securely chat, share photos, videos, and more, using OpenPGP to authenticate peers and OpenSSL to encrypt all communication.

Soulseek® is a unique ad-free, spyware free, and just plain free file sharing application. One of the things that makes Soulseek® unique is our community and community-related features. Based on peer-to-peer technology, virtual rooms allow you to meet people with the same interests, share information, and chat freely using real-time messages in public or private. Soulseek®, with its built-in people matching system, is a great way to make new friends and expand your mind!

BiglyBT is a feature filled, open source, bittorrent client based on the Azureus open source project, now Vuze .

MLDonkey is an open source, multi-protocol, peer-to-peer file sharing application that runs as a back-end server application on many platforms. It can be controlled through a user interface provided by one of many separate front-ends, including a Web interface, telnet interface and over a dozen native client programs.Its great when you have multple computers and you want to set up one server to download and in multiple computers with multiple users you can add files. (use it with Sancho Gui)

Simple and easy to useFully decentralized networkAll shared files are indexed locallyNo relaying of other user's searchesPure UDP protocol that utilizes forward error correctionFull connection encryption and decentralized public key infrastructureRecirculating token system that helps distribute upload bandwidth fairlyEfficient and fast transfers via re-combining and re-encoding blocks at all nodesClean install and uninstall, or stand-alone operation, with no annoying .Net or Java dependenciesNO Spyware NO Ads NO Nonsense »

[Be careful during the installation: Forum ]

Gigatribe is a p2p software with more than 1 Million users. Its an easy way to share and transfer files between friends or colleagues.

Acqlite is Gnutella file sharing program based on LimeWire, Acquisition and Cabos. It is free software and contains no spyware or adware. It provides a simple interface, multiple language support, and iTunes + iPod integration.