CleanMyMac X - Clean, protect and speed up your Mac
Onyx by Titanium - This website provides operating system utilities for macOS
Fossils - Find and clean out all your old unused files
R-Wipe&Clean - R-Wipe&Clean is a complete R-Tools answer for wipe futile records and keep up your PC protection.
DaisyDisk - DaisyDisk is a disk analyzer tool for OS X that visualizes hard disk usage and allows to free up hard disk space.
Memory Clean - Super Powerful Memory Cleaning Utility for Mac