Gamatam Tasks tracks tasks between Worpress users, allowing users to edit the description, change the task status, change the priority and assign the task to a different user. It is not as comprehensive as most issue trackers (no work flow etc) by design, I found a lot of clients looking for something more useful than a spreadsheet or todo list, but not as complicated to use as bugzilla, trac et al.
BeauLebens.com
An aggregation of Beau on the internet
