Refal.NET - Versatile, Compact yet Powfull Text Transformer and Compiler-Writing System. Based on Refal.NET VirtualMachine (+Refal.NET Compiler), this RAD-tool might be used for rapid prototyping, decreasing up to 10 times development efforts.
NState is a pragmatic Finite State Machine implementation in DotNET. FSMs are defined either in XML or programmatically, and can be run directly or compiled to either C# or VB.NET. Includes WinForms and ASP.NET Panels, and Visual Studio integration.