An ASP.NET control that lets you present interactive flowcharts and diagrams - Windows Software $500. NetDiagram is a general-purpose software component that can be used to display various types of flow diagrams and charts in web applications. It is implemented as a .NET web control and can be easily integrated into any project targeting the Microsoft ASP.

NET platform. NetDiagram can give graphical representation to object hierarchies, graphs and networks, entity-relationship / database diagrams, IVR systems, organizational charts, and more. The control is runtime royalty free. Apart from the per-developer license fee, there aren't per-server or per-user deployment fees required.