DevDocs

DevDocs combines multiple API documentations in a fast, organized, and searchable interface. Here's what you should know before you start:

1. To pick your docs, click Select documentation in the bottom left corner
2. You don't have to use your mouse — see the list of keyboard shortcuts
3. The search supports fuzzy matching (e.g. "bgcp" brings up "background-clip")
4. To search a specific documentation, type its name (or an abbreviation), then Tab
5. You can search using your browser's address bar — learn how
6. DevDocs works on mobile and is available as a Chrome web app
7. For the latest news, subscribe to the newsletter or follow @DevDocs

DevDocs is free and open source

http://devdocs.io/