IronRuby
IronRuby tools for Visual Studio
IronRuby tools provide a Ruby code editor, a file-based project system, and an interactive Ruby interpreter, all inside Visual Studio 2010, and all for free.
IronRuby Tools - Rails project system
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IronRuby Tools
IronRuby Tools are now part of the main IronRuby 1.1+ installer.
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