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 ...
Zulip : Powerful slack-like open source group chat
Postal : Postal is a complete and fully featured mail server for use by websites & web servers. Think Sendgrid, Mailgun or Postmark but open source and ready f...
Prometheus : Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud. Prometheus's main features are:
a multi-dimensio...
Passbolt : Passbolt is a free and open source password manager that allows team members to store and share credentials securely. Passbolt is free, open source an...
Mattermost is a self-hosted solution for bringing all your team communication to one place, and making it searchable and accessible anywhere