"jxtaSpaces is an experimental project to design and implement a distributed shared memory service on the JXTA peer-to-peer computing platform."
Implementations of the Rete Algorithm:
http://drools.org/index.html - Supports Jelly, Java and Python. Also, using Jira for bug tracking and Maven.
http://www.haley.com/CafeRete.html - Support EJB, Sevlets and Applets.
Wasp is a code analysis tool for Java:
http://www.waspsoft.com/ - Wasp also produces detailed and precise method call graph. The method call graph of a program helps to know for each method what actual methods are called in its body.