I've also used for several sinatra apps. Their refactoring, autocomplete, debugging and unit test/rpec is superb. Not to mention it supports Mercurial and is fr

I've also used for several sinatra apps. Their refactoring, autocomplete, debugging and unit test/rpec is superb. Not to mention it supports Mercurial and is free, what Intellij's Ruby IDE doesn't (the core is open and free, and supports mercurial, but their ruby thing is not a plugin, and it is not compatible with the good stuff). Yeah, its a loss, but they've been neglecting it for a while, so it is sad.