Isobuster - Low cost utility to recover data from damaged, scratched, or otherwise defective discs.

QuickSFV - QuickSFV integrates into the Windows Explorer shell and makes it very easy to verify files.

CDRoller - Recover your valuable data shortly! Recover data from CD, DVD, Blu-Ray discs, flash memory cards with CDRoller - powerful, easy-to-use and low-cost software for CD / DVD / BD / HD-DVD / Flash data recovery

hashdeep - Cross-platform tools to computer hashes, or message digests, for any number of files while...

CDCheck - CDCheck can check each of your CDs and DVDs and indicate which files are corrupted.

AIDE - AIDE (Advanced Intrusion Detection Environment) is a file and directory integrity checker.