Dash for macOS
Dash is an API Documentation Browser and Code Snippet Manager. Dash stores snippets of code and instantly searches offline documentation sets for 200+ APIs, 100+ cheat sheets and more. You can even generate your own docsets or request docsets to be included.
Dash has a buttload (200+) autoupdating documentation sets that are fully searchable. It’s really nice if you enjoy having reference information all in one place. IE. not browsing StackOverflow constantly.