BPEL Open Source - The ActiveBPEL Community Edition BPEL Engine
ActiveBPEL Community Edition Engine is an open source implementation of the BPEL standard, and the BPEL4People and WS-Human Task specifications. This implementation is the ideal personal learning tool to become familiar with these standards.
Introduction to BPEL and ActiveBPEL (2007)
ActiveBPEL Engine and ActiveBPEL Designer (2006)
ActiveBPEL Process Orchestration on JBoss ESB
ActiveBPEL 5.0 Documentation