This is a program very similar to other expensive Live Support Chats, xHTML and CSS compliant and...
Free and GPL.
It has also a WinApp but that is neither free nor GPL (but not too expensive).
This web-based business application is a great tool for assigning and tracking issues and tasks during software development and any other projects that involve teams of two or more people.
In fact, in only 4 weeks after its release, Issue Manager was downloaded thousands of times and is currently used at hundreds of companies and corporations, small and large.