Tron Script - Tron is a glorified collection of batch files that automate the process of cleaning up Windows systems.
Avast Cleanup - Next generation tuneup and cleanup for your PC
SKTools - SKTools is a multi-featured and easy-to-use application that is bundled with over 60 tools to help you boost the performance of the system.
CleanMyMac X - Clean, protect and speed up your Mac
NETGATE Registry Cleaner - NETGATE Registry Cleaner cleans and defragment your registry.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.