Finally RadRails 0.7 is available for download. It’s built on top of eclipse

If you are a Ruby on Rails developer, this IDE is your second best choice after TextMate Actually it’s your only choice if you don’t have a mac.

I use eclipse almost every day for my Java/J2EE development. It’s a very good tool but it eats a lot of my computer resources.. I’ve never liked Java desktop application anyway.

As for RadRails, well it’s much slimmer than my RAD (IBM Rational Application Developer) but still uses a lot of memory.

TextMate is much faster and lighter. It’s a powerful text editor like Vi and Emacs with a very user friendly interface.

I think TextMate is perfect for interpreted languages since you really don’t need an IDE. However, I wouldn’t want to use it for Java development where eclipse is better fit for it.

At the end .. what tool to use depends on the task you need to achieve..