CleanMyMac X - Clean, protect and speed up your Mac
TrashMe - Our iTunes companion will be shortly compatible with Spotify and will be available on our webstore too. Jibapps is a small French company producing applications for macOS.
Fossils - Find and clean out all your old unused files
AnyTrans for Android - Best Android manager to manage all your data and files
Carpet - The easiest way to keep your desktop "clean" ;)
AppCleaner - AppCleaner 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.