slipwire.pl v1.1 is the first iteration of a filesystem integrity checker. It compares the MD5 hashes of files to an initial state and alerts the user of any changes.
You can download it from the following link: https://packetstormsecurity.com/files/download/10455/slipwire
Source: https://packetstormsecurity.com/files/10455/slipwire.html