Web-based test case management system that works as an add-on for Bugzilla, the popular bug tracking application. [Open source, Mozilla Public License]

This tool is a fully web-based defect tracking and support ticket system that manages issues and bugs, customer requirements, test cases, and allows team members to share documents. [Commercial, trial version]

PHP- and MySQL-based test management solution helping to organize test cases, scripts, documentation and related files. [Commercial]

Creators of Ken TestMan, a web-based test management tool to prepare, plan, execute and record the results of tests. [Commercial]

Specializes in methods and tools for software test engineering offering defect management systems and a a test case design tool. [Commercial, trail version]

Allows to manage every aspect of the testing process, providing a consistent and structured approach to testing at the project and corporate level. [Commercial]

Official site of a software test management method. Description of the method as well as presentations of books about the topic, events, downloads and exemplary cases.

An integrated test case management software solution, providing a tool for software test teams to create and update effective test plans and test cases. [Commercial]

Project site of QaTraq, an AMP (Apache, MySQL and PHP) based document management system, covering test plans through to test cases, with associated test results and reporting capabilities. [Open Source, GPL]