1)   AddFlow for .NET V2.0
AddFlow for .NET is a .NET Windows Forms Custom control that is useful each time you need to display and use relationships between objects in your application

 2)   JGraph 5.7.4.5
JGraph is the leading Open Source Java Graph Visualization Library. It follows Swing design patterns to provide an API familiar to Swing programmers and functionality that provides a range of features to implement workflows, networks, flowcharts...