Selenium - Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.

DevTest - Test management solution for efficient quality assurance

Ranorex - Ranorex is a GUI test automation framework for testing of desktop, web-based and mobile applications.

dotCover - JetBrains dotCover is a .NET unit test runner and code coverage tool that integrates with Visual Studio.

Cucumber - Cucumber is a BDD tool for specification of application features and user scenarios in plain text.

QAComplete - Get award winning tools for all of your Software Quality needs and start improving your desktop and web applications today. Free trials are available for all.