ProSum is a console based program that protects your files, sys_call_table and IDT in a manor similar to tripwire (All in user space, without kernel modules). In addition, database with files etc. could be encrypted with Blowfish algorithm and files that are protected could be store at any secure/bastion host to later replace them. ProSum could be run on any UNIX system, at least with file protect mode (without IDT and sys_call_table support).
You can download it from the following link: https://packetstormsecurity.com/files/download/29621/prosum_0.28.tgz
Source: https://packetstormsecurity.com/files/29621/prosum_0.28.tgz.html