CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
CleanMyMac X - Clean, protect and speed up your Mac
Avast Cleanup - Next generation tuneup and cleanup for your PC
Advanced System Optemizer - Clean, optimize and personalize your PC
CleanMyPC - A smart cleaning tool for a better-running computer.
TreeSize - TreeSize tells you where precious disk space has gone to.