DevTest - Test management solution for efficient quality assurance
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.
dotCover - JetBrains dotCover is a .NET unit test runner and code coverage tool that integrates with Visual Studio.
Oni - An IDE powered by Neovim
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.
GraphWalker - GraphWalker is an open source Model-based testing tool for test automation. It's designed to make it easy to design your tests using graphs.