Not sure what you mean by more 'robust' than trac. that said, we use redmine at work. saw this the other day http://16bugs.com/ http://16bugs.com/ which looke

Not sure what you mean by more 'robust' than trac. that said, we use redmine at work. saw this the other day http://16bugs.com/ http://16bugs.com/ which looked like it might be interesting.