The new version of the Parrot dynamic languages virtual machine has better garbage collection and it's on GitHub now.
Parrot is a virtual machine designed to run all dynamic languages. This week, team Parrot released version 2.10.0.
What's new with Parrot?
It's on GitHub now. The garbage collector has been optimized and memory leaks fixed. There are other improvements, you can read about them here.
The next release is scheduled for December 21, 2010.