The goal of the Jupiter project is to investigate scalable Java Virtual Machine (JVM) architectures. Jupiter is released under GPL, A modified version of GNU Classpath is used under GPL with Exceptions http://www.gnu.org/software/classpath/license.html
High Availability using Virtualization:
Set up two servers (main and backup). The backup should come into action when the main goes down, & should continue the operation that the main was running, exactly from the point of failure, without loss of data.
A Garbage Collector implementing an 'Oldest First' algorithm, written in C++ to be integrated with a managed environment(java/CLI). The first current target of the GC is the Apache Harmony JVM.