[markpercival]

This is what I like about http://railsapi.com (which is just Sdoc), it gives you searchable ruby docs, and each method comes with a link to the code on Github.

This way when you're looking at, say, the Request objects :remote_ip method, one click gets you to the implementation along with the ability to follow the code around the Class.

And since the code for it's available as a standalone (http://github.com/voloko/sdoc/), your not limited to just the Rails docs, but any ruby code on Github.