Gallio - Automation Platform for .NET

At present Gallio can run tests from MbUnit versions 2 and 3, MSTest, NBehave, NUnit, and xUnit.Net. Gallio provides tool support and integration with CCNet, MSBuild, NAnt, NCover, Pex, Powershell, Resharper, TestDriven.Net, TypeMock, and Visual Studio Team System.