RunaWFE Free

RunaWFE Free is a fully functional business process management system. It includes Workflow engine, Process Designer (Developer Studio), Form Builder, Task notification client, and other components that provide end-user convenience. BPMN and UML AD notations are supported.

Thanks to RunaWFE web interface users can receive, filter, perform and delegate the tasks of business process instances, start new business process instances, view the properties of started business process instances, deploy new business process definitions. Administrators can: create /remove actors and groups, include /exclude actors to/from groups, grant permissions on system objects to actors and groups, forcibly stop business process instances, add/change actors substitutions rules.

Tutorial: https://runawfe.org/doc/Tutorial
InstallationGuide: https://runawfe.org/doc/InstallationGuide
Documentation: https://runawfe.org/doc/Documentation