Parabackup
From Hak5
Here is a utility I wrote a while ago. Written in Perl, works on Windows 2k and higher. It does a backup to disk, with file names like 09222006-backup.bkf. It keeps the files around as long as you tell it to, and will automatically clear out older backups. There are many other configuration options. Download it and try it to find out all of them. This is licensed under the GPL. If you do a modification/improvement, please sumbit a copy to me at dan@paradizelost.net so that i can adjust my master copy.