Yesterday, ActiveState released Komodo 3.5.1, an IDE for dynamic languages. This version fully supports Ruby on all platforms (the previous version was not available on Windows).
Komodo offers advanced support for Perl, PHP, Python, Ruby, and Tcl, on Linux, Mac OS X, Solaris, and Windows.
Komodo’s customizable language-aware editor and extensible workspace assist the developer with a supportive yet powerful environment, including source code control integration (CVS, Perforce, and Subversion), web technologies support (CGI, XML, and XSLT), a powerful regular expression toolkit, and comprehensive debugging support.
This is a milestone for Ruby. When I started with Ruby in 2001, there weren’t any IDEs for Ruby (which is why Rich Kilmer and I started the FreeRIDE project). Now, there are enough IDEs released (Komodo) or available in usable betas that I am actually writing a comparative review article on them for O’Reilly!