DSynchronize is a stand-alone utility that let you periodically synchronize two or more folders in a LAN (also working with UDF-CD-DVD, USB Keys etc.)
Is also possible to specify the time and the day on which the sync have to run, and to create some filters.
There is also an option to add the date and time of the sync to the name of the folder, to obtain a series of backups, classified by date and time.
Optionally Real-Time sync is available.