This article is from the Problem Management Tools FAQ, by Dave Eaton firstname.lastname@example.org with numerous contributions by others.
ProblemTracker by NetResults is a Web-based tool for bug tracking and
change management. Some of the features include
* A user-definable workflow system that helps manage the process of
getting bugs fixed
* Email integration and notification
* Full query and reporting capabilities
* Summary reports
* Customer bug reporting that allows your customers to submit
problem reports over the Internet to ProblemTracker
* Web-based file attachments
* Full HTML online help
A supplier WWW site is available at http://www.n2r6.com.