Aptana Studio

Aptana Studio screenshots

It allows you to develop and test your entire web application
Project Properties
Aptana Studio 3.2 : Project Properties

Alternative downloads

Ruby
Provides a self-contained Windows-based installer that contains a Ruby language.
9.8.1.5
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Aptana RadRails
Free, open source IDE for Ruby and Rails applications.
2.0
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Microsoft Visual Studio Ultimate 2013 Preview
It simplifies the tasks of creating, debugging and deploying apps.
12.0.20617.1