https://www.yfiles.com/demos/showcase/bpmn/
BPMN Editor Demo - yFiles for HTML
An interactive business process diagram editor with BPMN node styles and a special layout algorithm.
yfiles for htmlbpmn editordemo
https://www.syncfusion.com/showcase-apps/wpf/bpmn-editor
Build a BPMN Editor in WPF | Workflow Designer | Syncfusion Showcase
This BPMN editor uses Syncfusion WPF components to help users model, edit, and visualize business workflows with an intuitive and interactive interface.
build abpmn editorworkflow designerwpf