The BIS-Grid engine is an extension of the UNICORE 6 middleware (www.unicore.eu) that implements WSRF compliant services to support WS-BPEL based workflow execution in Service Grids. This project is partly based on the ActiveBPEL engine
Twister is aiming at providing an easily integrable, B2B oriented, BPM solution in Java based on the WS-BPEL specification. The communication layer follows Web Services standards. Twister supports the SOA pattern as well as human participants interaction