src: blog.leonardo.com.au
This article provides a comparison of Business Process Model and Notation (BPMN) tools.
https://www.yworks.com/products/yfiles-for-java-2.x/ybpmn Clearly states that one must license and pay for the BPMN extension.
Changes "Freeware" for yEd to say "Basic yEd is Freeware
BPMN extension is payable"
Video Comparison of Business Process Modeling Notation tools
General
Maps Comparison of Business Process Modeling Notation tools
References
Source of article : Wikipedia