CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
SDelete - Securely overwrite your sensitive files and cleanse your free space of previously deleted files using this DoD-compliant secure delete program.
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
Kerish Doctor - Kerish Doctor 2015 is an all-in-one solution for automatic maintenance of Windows-based computers.
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.