I use Redmine at my current employer, and I really like it. Reminds me a lot of Trac, which I used two companies ago and loved. By the way, at my last employer

I use Redmine at my current employer, and I really like it. Reminds me a lot of Trac, which I used two companies ago and loved. By the way, at my last employer, we rapidly switched between a number of trackers. At first, we used Unfuddle for our proprietary projects and Assembla's custom Trac for our open-source projects. Well, theoretically at least; in practice, we did very little with Assembla as a bug tracker (which is a shame, because I love Trac). At some point, we switched to using OpenERP for everything. it was terrible. Then we switched to JIRA, and it was only slightly less terrible.