If you go through orabpel related jars most of the classes would be having package name with ‘collaxa’ in it.Few words about this startup company .
Collaxa was a pure-play BPM startup whose BPM orchestration product has supported BPEL for more than a year. Collaxa was founded in 2000 and was one of the first companies to build its product around the Business Process Execution Language (BPEL), a Web services specification. BPEL is designed to be an XML-based industry standard for business process management. They packaged the emerging Web service orchestration standards (SOAP Conversation, BPEL4WS and WS-Transaction) into a reliable and easy-to-manage software solution and made it easy for Java developers to publish synchronous and asynchronous Web services and compose them into reliable and transactional business flows.
Collaxa has a long history with BPEL, creating one of the first and most proven implementations of BPEL. With its native BPEL engine, Collaxa provided organizations such as the European Space Agency, SAIC and British American Tobacco the most open means for executing business processes written in BPEL
Collaxa was acquired by Oracle in June 2004, and its BPEL Server product is now marketed as Oracle BPEL Process Manager.