WfMOpen workflow engine - WfMOpen is a lightweight J2EE based workflow engine with OMG like API, using XPDL as process description language. Open Source. CuteFlow - Document Circulation System - Web-based document circulation tool (Open Source). Users are able to define "documents" which are sent step by step to every user in a list. Open Business Engine - 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. wftk: Open-Source Workflow Toolkit - 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). YAWL - An open-source workflow engine with a fully-featured workflow modelling environment and execution engine. ProcessMaker - Open source business process management software suite for SMEs that automates custom document-intensive, approval-based processes. NextGRID Adaptive API - Java engine for programming and executing grid workflows. Eclipse Java Workflow Tooling - An Eclipse project that provides a complete toolset for workflows and processes from design to monitoring.