cal.com : Open source meeting scheduling tool. Send a link, let others book a slot. Calendly alternative.
Uptime Kuma : Uptime Kuma is an easy-to-use self-hosted monitoring tool.
Data Science Toolkit : A collection of the best open data sets and open-source tools for data science, wrapped in an easy-to-use REST/JSON API with command line, Python and ...
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 ...
Gerrit : Web based code review and project management for Git based projects.
