I found a list of Bug Tracking tools with the following names. Visual Studio Team System features are of course not listed but I am curious of what do you use for this purpose. There are no .NET tools here; I’ve seen some successful attempts of using just Project Server. Feedback?

• StarUnit : just CaptureBugsWithTests
• BugZilla: open source, powerful, but not very easy to set up.
• Bluetail Ticket Tracker (http://btt.sourceforge.net/): very easy to setup and use, free elementool (http://elementool.com): web based, so there is no set up, and it is free. The functionality is fairly basic.
• Mantis (http://mantisbt.sourceforge.net/): PHP/mySQL-based, open source. Current version is only 0.18, but already very usable. Great (i.e. simple) UI.
• FogBUGZ (http://www.fogcreek.com/FogBUGZ/): Web-based. Intended to be straightforward, yet powerful. Developed by the moderately well-known developer Joel Spolsky (http://www.joelonsoftware.com/)
• WikiWikiWeb: can be used for bug tracking, but misses certain features desirable for this purpose
• SourceForge itself contains web-based bug-tracking software (http://sourceforge.net)
• Bug Track is a simple Perl/DBI bug tracking tool (http://agstools.com/bugtrack/index.html)
• Agility (http://www.agileedge.com Bug Tracking) from AgileEdge is a simple Java Web-based Issue and Bug tracker.
• Roundup (http://roundup.sourceforge.net/)
• Any wiki (see note in TwikiClone)
• Code Track http://www.openbugs.org/ - light-weight, PHP/XML, open source/GNU GPL
• JitterBug http://samba.anu.edu.au/jitterbug/ - light-weight, C CGI program, open source/GNU GPL, used by the samba team http://directory.google.com/Top/Computers/Software/Configuration_Management/Bug_Tracking/Free/
• CvsTrac? http://www.cvstrac.org - tracks bugs and cvs checkins, includes a wiki and cvs browser. Best idea: bug descriptions and cvs checkin comments are wiki formatted so they and wiki pages can refer to each other. Open source/GNU GPL.
• Trac (http://www.edgewall.com/products/trac) - seems like a follow on from CvsTrac?. It integrates issue/bug tracking, subversion checkins, wiki and a few other goodies. Makes the crosslinks between rfcs, bugs, work orders etc very visible.
• ITracker (http://sourceforge.net/projects/itracker) - A free, open-source java implementation that seems ok but lacks all the features of BugZilla.
• Bug Rat (http://www.gjt.org/pkg/bugrat/) - A free, open-source java implementation ... but the code is a BigBallOfMud
• Scarab (http://scarab.tigris.org/) - intended as a replacement for BugZilla. Implemented in java. Too heavy and bloated.
• Insecticida (http://sourceforge.net/projects/insecticida/) - Originally a fork from Workbench (http://sourceforge.net/projects/workbench/). Implemented in PHP. Iteration aware. Check-ins are emailed to all the team members. Several interesting KeyPerformanceIndexes? ... but the code is a BigBallOfMud.
• PR-Tracker (http://www.prtracker.com) - Easy to use bug/issue tracking software. Has free 1 users options.
• JiRa - free for open-source and non-profit projects.
• Double Choco Latte (http://dcl.sourceforge.net/) - Looks pretty good, nice and easy to use. Has quite a few features (but missing out some of the more complicated ones).
• Rational ClearQuest? - expensive and big. Highly customisable through Perl and VBScript APIs. Scalable, multi-site-capable.