Moq.Delegates (nuget): Moq library with delegate mocks patch applied. See https://code.google.com/p/moq/issues/detail?id=235 for details and patch (by quetzalcoatl.pl AT gmail DOT com).  The simplest mocking library for .NET 3.5/4.0 and Silverlight with deep C# 3.0 integration.
Keywords: tdd|mocking|mocks|unittesting