Onyx by Titanium - This website provides operating system utilities for macOS
R-Wipe&Clean - R-Wipe&Clean is a complete R-Tools answer for wipe futile records and keep up your PC protection.
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
Cocktail - General purpose system modify/repair utility
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.
Clean Temporary Places - Clean Temporary Places is a cleaning tool that lets you clean temporary files to free up some space on the disk and get rid of disk error, disk defragmentation, etc.