CleanMyMac X - Clean, protect and speed up your Mac
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Fossils - Find and clean out all your old unused files
Wise Disk Cleaner - Clean junks of Browsers, remove junk and useless files of Windows and Defragment your disk. Wise Disk Cleaner can delete these unnecessary files on your hard disk to free up disk space and make your computer run faster.
DaisyDisk - DaisyDisk is a disk analyzer tool for OS X that visualizes hard disk usage and allows to free up hard disk space.
CleanMyPC - A smart cleaning tool for a better-running computer.