Revo Uninstaller is AMAZING!! it uninstalls programs with the normal uninstaller that comes with the software, than it searches ur computer for any left over files and registry entries that the program's uninstaller didn't remove, and gives u the option to remove them. It is free. it also has some other tools, like a start-up manager.
Here is the link for it:

http://www.revouninstaller.com/