Java port of a concurrent trie hash map implementation from the Scala collections library

The Mirah Programming Language

Improved Scala actors library; used internally at Twitter

a ruby-to-javascript source-to-source transformer.

Dynamic Linker Framework for Languages on the JVM

Ruby Enterprise Edition based on MRI 1.8.7-p248

Ruby Enterprise Edition based on MRI 1.8.7-p174

A simple dynamic language for the JVM

Java Client and Connectors for Redis

simple, distributed message queue system (inactive)