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.
Uier - Codeless or low-code User Experience test editing and management using Selenium to perform testing...
UI.Vision - Modern open-source task and test automation tool and Selenium IDE.
Webinject - WebInject is a free tool for automated testing of web applications and web services.
TestComplete - TestComplete Desktop, Web, and Mobile helps you create repeatable and accurate automated tests across multiple devices, platforms, and environments easily and quickly.
Screenster - 10x faster UI testing without a line of code.