- A work tracking system.
PTS - is a problem tracking package based around X and the Athena widgets
RUST - Problem/Work tracking package which can handle multiple mailing lists.
TRS2 - Trouble Report System - This is a set of Bourne shell scrips and C programs intended to maintain a database of trouble reports.
The Wesleyan Student Net - RT is a request tracking package based on the "user sends mail to a group of people to report a problem which is then tracked and dealt with" paradigm. RT is written in perl5 with a mySQL backend and has CLI and Web interfaces. It's free.