*[https://www.teamspeak.com/ TeamSpeak] - is a VoIP application for audio communication between users via a chat channel, similar to a video meeting. Cross-platform with military-grade security, lag-free performance, privacy and complete control.
*[https://github.com/RetroShare/RetroShare RetroShare] - is a Free and Open Source cross-platform, Friend-2-Friend and secure decentralised communication platform.
*[https://github.com/JFreegman/toxic Toxic] - is a Tox-based P2P messenger that provides end-to-end encrypted communications without the use of centralized servers. It supports text messaging, file sharing, 1-on-1 voice and video calls, private audio conferences, public and private text group chats.
*[https://www.jabber.org/ Jabber] - is a original messaging service based on [https://xmpp.org/ XMPP] and has been continuously offered for free since 1999.
::XMPP clients