The Pro big-brother product to the free Geek Uninstaller.
Ranked in these QuestionsQuestion Ranking
Pro Has comprehensive tracing feature
It can even continue to trace after an install is done. This is done by launching the application and appending a trace for config/preference files, downloaded content and the like.
Pro Force removal
Uninstall Tool lets you force uninstall programs that you can't get rid of with a standard uninstaller.
Pro Official Portable Version + Portable License Available
This means the application can be used from a USB drive. License wise this is a great option for people with multiple PCs or virtual machines too.
Con Trial is functionally crippled
The Uninstall Tool trial will find all the traces and let you select what to remove from your system but won't let you actually perform the deep clean until you purchase a license. The results can be saved and acted on once you purchase a license.
Con Ugly UI
With all toolbar menus enabled, it's pretty ugly.