MAC OS

AppCleaner is a small application which allows you to thoroughly uninstall unwanted apps.

AppDelete is an application for Macs that will delete the application you choose and any associated items (files and folders) that belong to that application. Now you will no longer have to hunt through your system to find these items and delete them manually.

GrandPerspective is a small utility application for Mac that graphically shows the disk usage within a file system. It can help you to manage your disk, as you can easily spot which files and folders take up the most space.

dupeGuru is a free and open source tool to find duplicate files on your computer. It can scan either filenames or contents. The filename scan features a fuzzy matching algorithm that can find duplicate filenames even when they are not exactly the same.