MkDocs : MkDocs is a fast, simple and downright gorgeous static site generator that's geared towards building project documentation. Documentation source files...
Outline : Team wiki, documentation, meeting notes, playbooks, onboarding, work logs, brainstorming, & more…
Fun Retro : Easy to use and beautiful restrospective board.
Beekeeper Studio : Open Source cross-platform SQL Editor and Database Manager. Use Beekeeper Studio to query and manage your relational databases, like MySQL, Postgres, ...
docopt : Command-line interface description language
Easy to Maintain Open Source Documentation Websites