pump.io : Social server with an ActivityStreams API. It's a stream server that does most of what people really want from a social network.
Zulip : Powerful slack-like open source group chat
Beehive : Beehive is an event and agent system, which allows you to create your own agents that perform automated tasks triggered by events and filters. It is m...
Astuto : Astuto is a free, open source, self-hosted customer feedback tool. It helps you collect, manage and prioritize feedback from your users.
