The OWASP ZAP core project
Test automation made simple
Translate files between XLS / XLSX and XML format . . .
Compile and run Java programs without using command mode!
Sahi is a web automation testing tool focused on testers
Easy to use GlobalPlatform tool (and a Java library)
Drives your automation lifecircle gathering information, test & deploy
A graphical, cross-browser, easy and Selenium-based testing tool
Squash TM is an open source tool for test repositories management.
Madcow 2.0 - Advanced Test Automation
Dynamically generated unit tests for basic verifications.