sync - Syncing your clock from command line

I manage a bunch of kiosk style PCs and I have noticed that my test machines have their time drifting a bit.

I'm curious, does anyone know of an freeware time syncing application that can easily be run on a schedule from command line to prevent this drifting?

• These systems are running Windows XP Embedded.


• They are not on a domain, so cannot use a DC.


• They have internet access, but some clients may be limited on outbound comm, it will have to be a case by case basis to config them

I've seen the Atomic Clock Sync from WorldTimeServer.com, but I don't see them having any command line utility that would run silently to sync the time.

Thanks for the help