Have a look at Redcar: http://github.com/danlucraft/redcar http://github.com/danlucraft/redcar Also try Textmate. Can't be extended (directly) with Ruby but i

Have a look at Redcar: http://github.com/danlucraft/redcar http://github.com/danlucraft/redcar Also try Textmate. Can't be extended (directly) with Ruby but it does rely heavily on Unix shell for lots of its stuff (usually Ruby scripts).