Uninstalling applications/programs on Mac OS is easier compared to Windows. You just drag the app to the Trash and the program is already uninstalled. However, the application is not uninstalled thoroughly. There are other related files scattered throughout the system eating up space on your hard drive.
AppCleaner solves this problem by searching your system with files related to the app to be uninstalled and then deletes them during the process.
You just have to drag and drop the unwanted application to the AppCleaner window and it will search for files related to the app. Click Delete to remove the application and the files.
AppCleaner may be downloaded from the FreeMacSoft website.