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.
Screenster - 10x faster UI testing without a line of code.
iMacros - iMacros allow you to record the most tedious and common actions you take on your browser and automate them to simplify the routine of your life.
Robot framework - Robot Framework is a generic test automation framework for acceptance testing and acceptance...
TestComplete - TestComplete Desktop, Web, and Mobile helps you create repeatable and accurate automated tests across multiple devices, platforms, and environments easily and quickly.
Galen Framework - Automated testing of look and feel for your responsive app