AppCleaner from Freemacsoft is a small application which allows you to thoroughly uninstall unwanted apps.
Installing an application distributes many files throughout your System using space of your Hard Drive unnecessarily. AppCleaner finds all these small files and safely deletes them.
Simply drop an application onto the AppCleaner window or select from a pre-determined list of installs applications. It will find for the related files and you can delete them by clicking the delete button.
I personally use this on all my Macs, both Intel and PowerPC and would recommend AppCleaner for its easy-to-use interface and clean approach to removing unwanted applications.