DevDocs - Great Reference!
DevDocs combines multiple API documentations in a fast, organized, and searchable interface. Here's what you should know about DevDocs:

1- To enable more 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 offline, on mobile, and can be installed on Chrome and Firefox.
7- For the latest news follow @DevDocs
8- DevDocs is free and open source
9- If you like the app, please consider supporting the project on Gratipay. Thanks!
Happy coding!