There are dozens and dozens of testing tools out there in the wild. For large custom application development projects, I've found that using a tool to store and manage test cases is very valuable. It's just too resource intensive to do this work by hand. In the old days, we'd roll-our-own solution by using the document management features of a tool like Notes or Exchange. We'd customize them so that we could create test suites, enter test results, add build numbers, assign testers, etc..This brings us to today. Surely, someone has built a great open source tool for test case management. Thankfully, the answer is a resounding YES. Of the choices available, we selected TestLink. It's open source. It's simple. It's proven (used by test shops at Intel, Lucent, Philips, Samsung, Symantec, Toshiba, Yahoo, etc.).
After using TestLink during the system testing of Wyoming's new excise tax system (went live July 2011), I can confidently recommend TestLink. Management likes it, the users like it, and their crazy architect likes it.
Discovery: If you plan on performing formal testing for a large project, consider using TestLink.
