Demonsaw - Demonsaw is the next leap in the evolution of a free Internet, and the debut of social cryptography.
Tox - Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.
Jitsi - Open-source video calling and chat platform.
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
i2pd (I2P Daemon) - i2pd (I2P Daemon) is a full-featured C++ implementation of I2P client
uTox - µTox is the lightweight client with minimal dependencies; it not only looks pretty, it runs...