What are some alternatives?
When comparing Sysinternals Suite and Glary Utilities, you can also consider the following products
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
Ultimate Windows Tweaker - Ultimate Windows Tweaker is a freeware Tweak UI Utility for tweaking and optimizing Windows.
Recuva - Accidentally deleted an important file? Lost files after a computer crash?
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
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.