fitSharp
Fit
fitSharp includes a .NET implementation of the Framework for Integrated Test (Fit) tool, including a .NET version of FitLibrary. You can use it to test .NET applications with story tests stored in the FitNesse wiki or in plain old HTML files.

The fitSharp Fit implementation is based on the Fitnesse.NET code base, but contains some Breaking Changes made to clean up historical inconsistencies and provide a platform for new features.
The following information has been copied from the previous implementation. I'm working my way through it bringing it up to date - at this point, some of it may be obsolete.
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