Onyx by Titanium - This website provides operating system utilities for macOS
Clean Master - Some users swear by it, some call it a glorified snake oil that does more harm than good. That can be said about any snake oil, but what specific brand of snake oil can boast almost a billion downloads around the world?
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
Click&Clean - Click&Clean is an inventive and free of cost answer for your PC that permits you to check your PC for Malware.
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.
SlimCleaner - SlimCleaner is a software package for cleaning and maintaining your PC or mobile device. It covers your entire system and can make your computer run more efficiently. Read more about SlimCleaner.