DiskPatch - Did the entire hard disk go blank? Does Windows complain that the volume needs to be formatted?
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Free Data Recovery Mate - Free File Data Recovery Software provides 4 recover modes
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
Free Any Data Recovery - 100% Completely Free Data Recovery Software
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.