YAWL is a free, open source BPM/Workflow system, based on a concise and powerful modelling language, that handles complex data transformations, and full integration with organizational resources, applications and external Web Services.
YAWL is the most powerful process specification language for capturing control-flow dependencies and resourcing requirements.
Supports drag and drop data mappings, or direct access to native data handling using XML Schema, XPath and XQuery.
A modular, service-oriented architecture provides an environment that can easily be tuned to specific needs.
FoPAS 2020 Workshop
If you work or research in process automation and related fields - even if you don't use YAWL - please consider submitting an article to the Frontiers of Process Aware Systems Workshop 2020, to be held October 5 in Eindhoven, Netherlands.