devdocs

DevDocs is a web app aimed at providing you with quick access to the reference manual of just about every front-end language and library.
It lists all the APIs of a given selected language and their official documentation in an easily browsable and viewable format, without the needless menus and tacky attempted styling that official sites like php.net try to pull off.
It’s an Ajax-driven and open source web app with syntax highlighting, even available as a Chrome extension or as a plugin for Sublime Text or Brackets