The Bug Genie is an open-source browser-based bugtracker I have been using for some time. It beats most trackers I tried in terms of features and usability and is also quite easy to install and administrate. Not saying it has no quirks, but I like it.
So why would I want to write links to bugs I fixed or manage lists of known bugs manually? That would only ensure work and pain should the TBG folks decide to change URL structures in the future. So I wrote that small plugin The Bug Genie for WP to do that for me. It is not the most impressive plugin under the sun but does the job. So if you use TBG and WordPress go and have a try!