The wftk is a general-purpose open-source workflow engine and toolkit, designed to work with diverse interfacing systems (databases, mail systems, and user interfaces).

An Eclipse project that provides a complete toolset for workflows and processes from design to monitoring.

Java-based open source workflow engine.

WfMOpen is a lightweight J2EE based workflow engine with OMG like API, using XPDL as process description language. Open Source.

Open source workflow engine written in Java, designed to execute workflow definitions written in XPDL. Designed to be embedded in an application, used as a stand-alone server, or used in a J2EE container.

Java engine for programming and executing grid workflows.

Massachusetts Institute of Technology, USA - PIF facilitates the exchange of process models. This language was used in the process handbook project. Contains the specification, workshop results and links to related projects. [completed, merged with PSL]

University of Georgia, USA - Aims at the reliable support of large-scale, complex and adaptive workflow applications in real-world multi-enterprise heterogeneous computing environments. Contains publications in PDF format. [project completed]

TU Eindhoven, the Netherlands - A collection of process patterns used for the evaluation of workflow management systems and related standards. Contains the patterns, evaluation reports and further documentation. Maintained by Wil van der Aalst and Art...

University of Geneva, Switzerland - Deals with an advanced network and agent infrastructure for the support of federations of workflow trading systems. Contains the project charter and some publications in PDF format. [project completed]