Zeal is a simple offline documentation browser inspired by Dash.

- Save yourself from distractions, and keep all documentation you need
  instantly available.
- Do not depend on your Internet connection or public Wi-Fi.
- Keep your documentation fresh with the built-in docset update system.
- Integrate Zeal with IDEA, Sublime Text, ViM, or your favourite IDE via
  variety of plugins.

WWW: https://zealdocs.org