HashCheck Shell Extension - File-integrity verification with CRC-32, MD5, SHA-1, SHA-2 and SHA-3, integrated into Windows...
checksum - checksum is a no-nonsense BLAKE2/SHA1/MD5 hashing tool for Windows.
HashMyFiles - HashMyFiles is small utility that allows you to calculate the MD5 and SHA1 hashes of one or more files in your system.
QuickSFV - QuickSFV integrates into the Windows Explorer shell and makes it very easy to verify files.
RapidCRC Unicode - RapidCRC is an open source CRC/MD5/SHA hashing program.
FreeFileSync - FreeFileSync is a free open source data backup software that helps you synchronize files and folders on Windows, Linux and macOS.