There are 2 repositories under bitrot topic.
Blocky archive - multithreaded archiver offering bit rot protection and sector level recoverability
Tool to detect userspace-visible changes to (supposedly) at-rest data
📐 A tool to check if there are any changes in your files by storing and later checking their digests/hashes (BLAKE2b512, SHA3-256, or SHA512-256).
Bringing back realistic RAID recovery to inexpensive disks
Quick tool to generate and check hashes of all files in a given directory recursively
Recursively create .par2 parity for an entire filesystem and automatically keep them up to date even when files are modified!
Reads every file in a given directory and all its sub directories. Warns if any file cannot be read from start to end.
Overwrite random positions of a partition with random data. Perfect tool to test checksumming filesystems.