So at work we are trying to decide if we should upgrade from Nunit to something else. I guess there is no real reason. Nunit works fine, so does testdriven. I just wish it was integrated better into the IDE. Zanebug is one that has a really neat GUI, csUnit has a neat integration part. Then there is mbUnit which I can't tell what it does. The webpage is somethig to be desired. And of course there is the option of the Team Server Unit testing. I'm not sure why they decided not to include that into the normal IDE. They still could have kept the continuous stuff in the TS. I need to find if there is a comparison chart of the different unit testing software for .NET.