We use JRuby with a bit of Java. The JVM is a very interesting place to be, with relative safety in the language and runtime, C-ish performance, and access to l

We use JRuby with a bit of Java. The JVM is a very interesting place to be, with relative safety in the language and runtime, C-ish performance, and access to lots of lovely libraries. And you don't have to program in Java to use it. Here's how we went from Ruby to JRuby + Java: http://bens.me.uk/2010/jruby-in-practice http://bens.me.uk/2010/jruby-in-practice