BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
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
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?
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.
Avast Cleanup - Next generation tuneup and cleanup for your PC