Free Utility Backs Up Frequently Changed Files

http://www.mogware.com/FileHamster/

Most users have learned to regularly save documents while they are creating them. While this prevents you from losing your work, it has the disadvantage that each time you save you write over the previous version and so can't go back to an early revision. You can get around this by using different file names each time you save but an easier way is to use the free FileHampster program that automatically time stamps and stores copies each time you save. Furthermore, it allows you to annotate each copy so that your revision versions are fully documented. There are some nice plug-ins too, including one that allows you to use a third party dif program such as WinMerge to view the differences between versions.