Avast Cleanup - Next generation tuneup and cleanup for your PC
HashCheck Shell Extension - File-integrity verification with CRC-32, MD5, SHA-1, SHA-2 and SHA-3, integrated into Windows...
CleanMyMac X - Clean, protect and speed up your Mac
RapidCRC Unicode - RapidCRC is an open source CRC/MD5/SHA hashing program.
WinExt Free - Powerful Win utilities: fix registry issues, clean system junk, protect privacy, optimize system, find duplicates, show larger resources, see more info of recently accessed resources, monitor activity, make batch operations, synchronize resources.
Md5Checker - Md5Checker is a free, faster, lightweight and easy-to-use tool to manage, calculate and verify MD5 checksum of multiple files/folders.