dvdisaster - Dvdisaster stores data on your CD/DVD/BD including additional error correction data to protect...
checksum - checksum is a no-nonsense BLAKE2/SHA1/MD5 hashing tool for Windows.
DataHealthCheck - DataHealthCheck is a portable app to check your files for corruption or display their md5/sha1 hash.
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
PAR Buddy - PAR Buddy is a free Parchive (PAR) and RAR client which makes it
Isobuster - Low cost utility to recover data from damaged, scratched, or otherwise defective discs.