The OWASP ZAP core project
SoapUI is a free and open source cross-platform functional testing
Load testing tool for analyzing and measuring performance of services
Benchmarking tool
A JDBC proxy driver for the recording and replay of database access
Marathon supports testing of Java/Swing and Java/Fx applications.
Mock service for SOAP/REST webservices to support automated tests.
Filler Studio for any kind of automation for Windows,Linux,Mac.
Sahi is a web automation testing tool focused on testers
Test automate native or hybrid Android apps and the mobile web
A model-based test automation framework for GUI applications
Java based load testing tool for HTTP applications.
Automated Testing for Web Applications
Functional Test Automation tool for pure AS 3.0 SWF and Flash Games