AppCleaner is a small application which allows you to completely and properly uninstall unwanted apps.
It isn't, in fact, sufficient to just delete an application. Installing an application distributes many files throughout your System using space of your Hard Drive unnecessarily.
AppCleaner can find all these small files and safely delete them.
The toolbar has the following useful features.
Drop an application onto the AppCleaner icon and AppCleaner searches for the related files and then by clicking the red cross it deletes them.
If you change your mind, just click on the green arrow back button.
The "Applications" button shows all the applications installed on your system. You can select them and then click on the magnifying glass search button. AppCleaner will search for the related files of the selected applications and delete them, too.
The "Widgets" button shows all the installed widgets and the "Others" button displays all the installed Preference Panes, Plugins and Screen Savers.