Disaster is a simple backup application for Mac OS X. It copies specified directories to any other location including external mass storage devices. Further backups only copy new and modified files, excluding those which doesn’t have to be copied or are included in the exclusion list. All versions are freely available.

Disaster 1.2
Disaster 1.1
Disaster 1.0

Important note: versions older than 1.2 contain Intel binaries only, 1.2 and newer contain universal binaries.

Release notes available here.