Agile Requirements Designer
Model-based test design tool deriving test cases from flowchart models
.NETUnit
xUnit-style unit testing framework for the .NET platform
A Real Validator
Offline HTML validator for Windows based on an SGML parser
Abbot
Java GUI testing framework with the Costello script editor
Achoo
Fluent assertion library for Python unit tests
AdaControl
Rule-based static analysis tool for Ada source code