Mac OS X
If you’re using OS X, you’re in luck! You can use the best (in my opinion) text editor, Ruby is already installed for you in OS X 10.2 (Jaguar) and up, and you get to use a real command line (not that silly wanna-be command line we have to use on Windows)!
My absolute favorite editor is TextMate (http://macromates.com/). It’s cute, it’s sweet, and it has great Ruby support. The only drawback is that it’s not free. But if you code as much as I do, it’s worth the (fairly cheap) price. And if you’re using a Mac, then I assume you are accustomed to getting the best…and paying for it! ☺ In any case, it has a fully functional free trial, so you can give it a try if you want. If you really need a free text editor, though, try TextWrangler ...
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