FoldersSynchronizer is a nifty and popular shareware utility for MacOS X to Synchronize and Backup files, folders, disks and boot disks.

Available with Timers, Multiple Folders, Filters, Exclude, Conflicts, Auto-mount Volumes, AppleScript and Settings. FoldersSynchronizer can sync/backup the deleted files, run with the root permissions, create working sessions, save/open your settings files... Learn More