Matrix is an open standard for interoperable, decentralised, real-time communication over IP. It can be used to power Instant Messaging, VoIP, WebRTC signalling and IoT communication. Matrix provides client and server reference implementations. (Apache)
Cross-platform
Ring is a free software for communication that allows its users to make audio or video calls, in pairs or groups, and to send messages, safely and freely, in confidence. (GPL)
Cross-platform
Rocket.Chat is is the ultimate open source webChat platform with an incredible developer community. Over 200 contributors have made our platform a dynamic and innovative toolkit, from group messages and video calls to helpdesk killer features. (MIT)
Cross-platform
With the rise of government monitoring programs, Tox provides an easy to use application that allows you to connect with friends and family without anyone else listening in. (GPL)
Cross-platform
Wire: modern, private communications. Crystal clear voice, video and group chats. No advertising. Your data, always encrypted. (GPL)
Cross-platform
5 applications