Riot : Riot allows teams to communicate across a wide range of collaboration apps. If some team members use Riot while others use IRC, Slack or Gitter, Riot ...
Mattermost : Mattermost is a self-hosted solution for bringing all your team communication to one place, and making it searchable and accessible anywhere
Commento : A lightweight, open source, tracking-free comment engine alternative to Disqus.
ProjectPier.org : ProjectPier is a Free, Open-Source, PHP application for managing tasks, projects and teams through an intuitive web interface. It must be downloaded a...
Zulip : Zulip is a powerful, open source group chat application that combines the immediacy of real-time chat with the productivity benefits of threaded conve...
