Collect feedback on any webpage, mockup, sketch, or image. Usability feedback in every stage of your design process. Participants point & click to share their opinion.

Capture any webpage from any browser, by simply putting Aviary.com/ in front of the URL. You can capture a page at different resolutions or to only capture a portion of the page as well.

Free PHP version of ColdFusion’s cfdump. Outputs colored and structured tabular variable information. Variable types supported are: Arrays, Classes/Objects, Database and XML Resources.

Free, open source script written in JavaScript, PHP and MySQL that lets you quickly generate large volumes of custom data in a variety of formats for use in testing software, populating databases, and

The Grinder is a JavaTM load testing framework that makes it easy to run a distributed test using many load injector machines. It is freely available under a BSD-style open-source license

FindBugs™ is a program to find bugs in Java programs. It looks for instances of "bug patterns" --- code instances that are likely to be errors.

Flexible open-source test automation solutions that encourage reuse and sharing among software architects, developers, Quality Assurance (QA) testers, and Information Technology (IT) Managers.

soapUI is the leading tool for Web Service Testing. With more than 300 000 downloads, it's the most used tool for SOA testing in the world.

Valgrind is a GPL'd system for debugging and profiling Linux programs.

A list of 74 Open source Functional Testing tools with Description, Requirements etc. This is a great resource for those who are searching for Testing tools in Google but cannot find a good one.

Browsershots makes screenshots of your web design in different browsers. It is a free open-source online service created by Johann C. Rocholl.