checksum - checksum is a no-nonsense BLAKE2/SHA1/MD5 hashing tool for Windows.
HashCheck Shell Extension - File-integrity verification with CRC-32, MD5, SHA-1, SHA-2 and SHA-3, integrated into Windows...
HashMyFiles - HashMyFiles is small utility that allows you to calculate the MD5 and SHA1 hashes of one or more files in your system.
OpenHashTab - OpenHashTab is a shell extension for conveniently calculating and checking file hashes from file properties.
GtkHash - A GTK+ utility for computing message digests or checksums.
QuickSFV - QuickSFV integrates into the Windows Explorer shell and makes it very easy to verify files.