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 .
ANts P2P realizes a third generation P2P net. It protects your privacy while you are connected and it makes you not trackable, hiding your identity (ip) and crypting everything you are sending/receiving from othersDiscontinued
10 years no release, abandoned project apparently