What rails IDE is used in this video?

http:开发者_StackOverflow//www.youtube.com/watch?v=jcMYbiZllLw

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TextMate

It works on Mac and it's a generic text editor though, doesn't just work with rails! That would be equivalent to Emacs if you were on Linux or e-texteditor if you were on Windows.

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This is actually not Textmate, It's BBedit or its free counterpart TextWrangler.