Information Week has an interesting piece up about open source disaster recovery tools. It covers a lot of the good applications that can come to the rescue when you need to recover data or revive a computer. They include SystemRescueCD, BackTrack, Partedmagic, TestDisk and more. In addition to these open source tools, there are also a number of great freeware products in this general category, especially for preventative maintenance. Here are five of them, with a couple of open source gems thrown in, that can help you avoid disaster.