Ace sms ActiveX SDK is a great tool to send receive Unicode SMS via GSM phone or Modem from windows system,AceSMS ActiveX is designed to work with a wide range of phones (Nokia:
Siemens:MotoFalcom: GSM Modem Wavcom Modem TC35 Modem
AceSMS ActiveX is based on a widely accepted Technical Specification known as :
GSM0705 All phone and modem support GSM0705 GSM0340 can use this controls to receive/send Unicode SMS,write/read Unicode PhoneBook

MOBILedit! is a revolutionary modular program which allows you to control your phone from the PC via Bluetooth, IrDA or cable. You can easily copy photos from your phone or upload ringtones, logos, MP3's and transfer documents too. You can dial, send SMS's, receive calls, organize contacts, play games and much more. MOBILedit! is designed as an operating system, you can enhance its functionality by adding new plug-ins and drivers.