Some years ago I wrote one (cleverly named Tracuala) for trac. It was good enough most of the time for my needs. Trouble was, Trac didn't have a real Web API at the time, so I was hacking around cookies and authentication and what not. And when I upgraded a Trac instance, stuff broke.
Nowadays I use Pivotal Tracker, which has a very nice Web API. That allowed me to write yet another CLI tool (cleverly named Pivotal Slacker) which works quite nicely for fetching lists of stories, adding new stories, doing bulk updates or additions from yaml files, and the like.
The upshot is that all Web-based tools should try to offer a decent RESTful API as well so that folks who want additional tools can add them without having to worry about coding to the quirks of Web page scrapping.
It syncs with various online bug trackers and supports full offline manipulation of the bugs. I would use it if I didn't just make a list of stuff to do in a text file.
Nowadays I use Pivotal Tracker, which has a very nice Web API. That allowed me to write yet another CLI tool (cleverly named Pivotal Slacker) which works quite nicely for fetching lists of stories, adding new stories, doing bulk updates or additions from yaml files, and the like.
The upshot is that all Web-based tools should try to offer a decent RESTful API as well so that folks who want additional tools can add them without having to worry about coding to the quirks of Web page scrapping.