Eventum Issue / Bug Tracking System

Eventum Issue / Bug Tracking System is a user-friendly and flexible issue tracking system that can be used by a support department to track incoming technical support requests, or by a software development team to quickly organize tasks and bugs. Eventum is used by the MySQL AB Technical Support team.
Eventum is available under the GNU GPL.
System Requirements
PHP 4.1.0 or newer versions
o PCRE Extension (usually enabled by default with newer PHP versions)
o Session Extension (usually enabled by default with newer PHP versions)
o MySQL Extension (built-in support with most PHP distributions)
o GD Extension
MySQL Database Server
Worths a look .. kind of sober screenshots, though :)