GBBopen
GBBopen is a high-performance open source distributed systems framework based on the concepts that were explored and refined in the UMass Generic Blackboard system (see PDF article on that history) and the commercial GBB product. The Portable-Threads library has been spun off from GBBopen, and is available separately (e.g. in Quicklisp).

Repository: http://gbbopen.org/svn/GBBopen/trunk/

License: Apache 2

Knowledge Representation Systems