WPF Diagram | Build Interactive Diagrams | Syncfusion
https://www.syncfusion.com/wpf-ui-controls/diagram
WPF Diagrams - Mindscape
http://www.mindscapehq.com/products/wpfdiagrams
Diagrams Control - Telerik UI for WPF Components - Telerik
https://www.telerik.com/products/wpf/diagrams.aspx