RetroShare is an open-source cross-platform, Friend-2-Friend and secure decentralized communication platform

Retroshare establishes encrypted connections between you and your friends to create a private and controlled network of computers and provides various distributed services on top of it: forums, channels, chat, mail, etc.

Retroshare is fully decentralized and designed to provide maximum security and anonymity to its users beyond direct friends. Retroshare is entirely free and open-source software. It is available on Android, Linux, macOS and Windows.