Shark is an extendable Java workflow engine framework including a standard implementation completely based on WfMC and OMG specifications using XPDL (without any proprietary extensions) as its native workflow process definition format and the WfMC "ToolAgents" API for server-side execution of system activities. It has well defined client interface, as well as its internal component interface.
Enhydra JaWE (Java Workflow Editor) is an XPDL2.1 based graphical workflow process editor fully adhering to WfMC specifications. It can be used to edit or view any XPDL file which conforms to WfMC specifications. It works with several open source and commercial workflow engines, like Enhydra Shark, WfmOpen, OBE, and OfBiz. It has participated in a WfMC interoperability demo where it was used to handle XPDLs from Fujitsu, TIBCO, and the Enhydra Shark engine.