What's a good Open Source or free ticket tracking system? [closed]

Solution 1:

Check out RT: Request Tracker, by Best Practical at http://bestpractical.com/rt/. It's free and open source and works pretty well from what I've heard/read from others. We use a custom-built system internally, so I don't have personal experience with RT.

Solution 2:

Wikipedia has a Comparison of issue tracking systems

Solution 3:

Roundup is pretty decent and easy to hack on if you know a bit of python.