Iside 

Iside is a message digest computing tool. It can be used for file integrity checking. It also compares files and folders by computing their hash code (MD5,SHA1,CRC32,...).
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Advanced CheckSum Verifier 

Comprehensive SFV and MD5 checksum utility for Windows. The handy and fast utility for protecting the integrity of files. It will allow you to verify the accuracy of your data after you burn a CD or transfer a files over a network.
checksum crc crc32 sfv md5 utility windows verifying data cd-r recording transfer error