Retro is a clean, minimalist language with roots in Forth. It supports all major OSes in use today, and was designed to be easy to learn, use, and modify for specific needs.
AppScale is a platform that allows users to deploy and host their own Google App Engine applications. It executes automatically over Amazon EC2 and Eucalyptus as well as Xen and KVM. It supports the Python, Java, and Go Google App Engine platforms.
A DSL and code generator for Java enterprise applications.
A library that solves Freecell games.