Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
Wise Care 365 - Wise Care 365 is a bundle of important registry, disk, and other system utilities for your PC.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Auslogics BoostSpeed - Auslogics BoostSpeed: Tune up Your PC for Peak Performance! . * Free trial lets you clean out junk files, enable several Live Speedup tools and run each of the 18 apps under All Tools once.
Advanced SystemCare - Free optimization software & registry cleaner for Windows 10, 8, 7, Vista and XP. Advanced SystemCare Free to speed up PC, clean registry and repair system in one click.
Razer Cortex - A free all-in-one software which gives you the best gaming experience, featuring best gaming deals, PC and Mobile Game Booster, and more!