使用html5画图：

https://gridwizard.wordpress.com/2015/03/25/simple-c-library-to-render-graph-to-flowchart/

 http://flowdesign.leipi.org/flowdesign/index/flow_id/673.html

wpf画图：

http://www.codeproject.com/Articles/23871/WPF-Diagram-Designer-Part

http://www.codeproject.com/Articles/22952/WPF-Diagram-Designer-Part-1

http://www.codeproject.com/Articles/23265/WPF-Diagram-Designer-Part

http://www.codeproject.com/Articles/484616/MVVM-Diagram-Designer

 

winform类似visio:

https://github.com/dalssoft/diagramnet

https://github.com/search?utf8=%E2%9C%93&q=nshape

http://mindfusion.eu/demos/flowchartnet/start.htm

https://github.com/Microsoft/automatic-graph-layout

http://files.cnblogs.com/files/yy3b2007com/UI.rar

 

flowchart

https://github.com/pradeepkodical?tab=repositories

 

very goods demo flowpad

http://flowpad.codeplex.com/

 

xsd diagram

http://regis.cosnier.free.fr/?page=XSDDiagram

https://github.com/dgis/xsddiagram

 

https://github.com/sethjuarez/Diagram.NET