dotTEST
Static analysis, unit testing and coverage for C# and VB.NET
dotunit
Port of JUnit to the .NET platform
DTM Data Comparer
Windows tool for comparing and synchronising data between databases
DTP
Reporting and analytics platform aggregating testing and compliance results
Dumbster
Fake SMTP server for unit testing e-mail sending
Dynamic Suite
Memory leak detection, code coverage and profiling tools by DMS Software