backup and synchronization program?

[D. H. Holsboer]

Hi,
I am looking for a program that can backup and/or synchronize data on my 
laptop (FC 8), on another FC 8 and on a WIN XP on my LAN. I have for WIN 
- WIN synchronization and/or backup the program SyncBack, but don want 
to have to switch to Win XP all the time I want to make a backup or 
synchronize the systems.
Does anybody know which Linux program performs these actions by simply 
copying files from one system to the system on which they are not 
present and overwriting old files with the newer versions? This is the 
way I use to my satisfaction the program SyncBack.exe. Of course, the 
Win XP machine is accessible via smb.
Later this month I plan to change to FC 9, hoping that most difficulties 
with the new version (no new version without itś own set of 
difficulties...) will be solved.
Daniel