Zeal is a simple offline API documentation browser inspired by Dash (OS X app), available for Linux and Windows.
* Quickly search documentation using Alt+Space (or customised) hotkey to display Zeal from any place in your workspace.
* Search in multiple sets of documentation at once.
* Don't be dependent on your internet connection.
* Integrate Zeal with Emacs, Sublime Text, or Vim. See Usage » Editor plugins for details.