NCrunch is described as *'automated concurrent testing tool for Visual Studio .NET.
It intelligently runs automated tests so that you don't have to, and gives you a huge amount of useful information about your tested code, such as code coverage and performance metrics, inline in your ID'* and is an app. There are four alternatives to NCrunch for Windows. The best alternative is Fine Code Coverage, which is both free and Open Source. Other great apps like NCrunch are OpenCover, dotCover and NCover.