Something like:
SimpleSMS After re-reading your orignal question, SimpleSMS won't help as this is SMS from PPC to Phone.
But you should be able to use any Windows/Linux based application that supports the normal GSM AT command set e.g
DesktopSMS (which I haven't tried found via Google) or if you have a Mac then you have this capability out of the box via MacOS X addressBook or 3rd party BluePhoneElite