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.
Robot framework - Robot Framework is a generic test automation framework for acceptance testing and acceptance...
STAF - The Software Testing Automation Framework (STAF) is an open source, multi-platform, multi-language...
Citrus framework - Citrus Integration Testing
Cucumber - Cucumber is a BDD tool for specification of application features and user scenarios in plain text.
PhearJS - Render any dynamic Javascript webpage to JSON with PhantomJS.