Bug Tracking
There are many open source and closed-source bug-tracking and "Issues Management" packages out there on the market. After evaluating many of the top 10 open source alternatives, the final choice was made to use a package called Mantis. It is extremely full-featured, includes the abliity to open and close bugs via email or through a browser, multiple projects, and dozens of other features. We hope that it will suit your needs as well.
