Perfect Dark!

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.

Tribler is an application that enables its users to find, enjoy and share content. With content we mean video, audio, pictures, and much more. Tribler has three goals in helping you, the user: find, consume and share content.

GNUnet is a framework for secure peer-to-peer networking that does not use any centralized or otherwise trusted services. A first service implemented on top of the networking layer allows anonymous censorship-resistant file-sharing. Anonymity is provided by making messages originating from a peer indistinguishable from messages that the peer is routing. All peers act as routers and use link-encrypted connections with stable bandwidth utilization to communicate with each other. GNUnet uses a simple, excess-based economic model to allocate resources. Peers in GNUnet monitor each others behavior with respect to resource usage; peers that contribute to the network are rewarded with better service. »

Calypso, formerly Kommute, is a cross platfrom file sharing client using the anonymous network MUTE. Developped using C++ and Qt. For windows and linux, portable to other environments. You can try it by following the installation instructions below.

Anomos is a pseudonymous, encrypted multi-peer-to-peer file distribution protocol. It is based on the peer/tracker concept of BitTorrent in combination with an onion routing anonymization layer, with the added benefit of end-to-end encryption. By combining these technologies, we have created a platform where by no party outside of the trusted tracker will have any information about who a peer is or what they are downloading.

StealthNet is based on the original RShare client and has been enhanced by a developer team who consists of Planet Peer community members. In comparison with the current RShare client StealthNet offers a lot of new features like download resuming (interrupted downloads can be resumed), multilanguage support, a search filter for several file types and much more.

MUTE File Sharing is a peer-to-peer network that provides easy search-and-download functionality while also protecting your privacy.

Phex is a peer-to-peer file sharing client for the Gnutella network. It is free software and without spyware or adware. Phex is released under the GNU General Public License. Phex is based on Java technology and therefore available for many different systems that offer a Java 1.4 runtime environment, such as Windows, Mac OS X, Linux and others.