IronRuby is an open source Ruby implementation being developed at Microsoft with the .NET CLR in mind. It's reasonably mature and as well being a regular implementation, it provides the ability to use Ruby directly within the Web browser through Microsoft's Silverlight Flash-esque...
IronRuby Q&A – What’s Down With Microsoft’s Ruby Implementation In 2010?
In-depth JRuby Q&A: What Makes JRuby Tick in 2010?
JRuby is undoubtedly the most mature of the alternative Ruby implementations. Supporting Ruby 1.8.7 and 1.9.1 (mostly!) and JIT compilation, JRuby is already in use in mission critical Ruby apps and runs scarily fast on the JVM. In this interview with JRuby...
Pancake: How To Stack and Loosely Couple Rack-Based Webapps Together
Much of Merb's momentum has been merged into Rails 3, but one-time Engine Yard developer Daniel Neighman has found himself moving in a new direction, inspired by what they had once achieved with Merb Slices. Since then, he's taken fully-mountable Rack applications...
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