HashCheck Shell Extension - File-integrity verification with CRC-32, MD5, SHA-1, SHA-2 and SHA-3, integrated into Windows...
RapidCRC Unicode - RapidCRC is an open source CRC/MD5/SHA hashing program.
HashMyFiles - HashMyFiles is small utility that allows you to calculate the MD5 and SHA1 hashes of one or more files in your system.
Md5Checker - Md5Checker is a free, faster, lightweight and easy-to-use tool to manage, calculate and verify MD5 checksum of multiple files/folders.
GtkHash - A GTK+ utility for computing message digests or checksums.
SFV Checker - SFV Checker Ensure your multi-volume file archives are complete and accurate!