RetroShare is open source software for encrypted filesharing, serverless email, instant messaging, online chat, and BBS, based on a friend-to-friend network built on GNU Privacy Guard (GPG). Developed by DrBob
License: Open Source
RetroShare offers a comprehensive platform with a wide range of features including video and voice calls, making it suitable for various communication needs. In contrast, Anomos focuses on anonymity and simplicity, making it ideal for users primarily interested in secure, anonymous file sharing.