More times than not, the built in program uninstaller in Windows Add/Remove program is more than enough, but if you are looking for a bit more functionality, take a look at MyUninstaller.

MyUninstaller, in addition to the obvious function of uninstalling programs allows you do remove dead entries, view more detailed program information (including installation strings, installed paths, etc.) and export currently installed program information.

The program is free, but I expect only power users would want to take a look into this. If you are happy with the existing functionally of the Windows utility, by all means stick with. MyUninstaller, however, appears to be a great alternative for people looking for a bit more.