Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.
Nertivia - Chat Client - Chat with friends or anyone around the world, free gif and emoji support.
GraphJS - Make any website social
Spectrum - Browser-based app to visualize the frequencies of an audio file.
MyTalk - Build a community around your product
Amity Communities - Discuss trending topics, news, and live events in real-time