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

Oxygen SMS ActiveX Control allows you to send and receive text and pictures, send CLI Logos, read and write default SMS centre number, get stored message total and busy count, their locations, read and delete from SMS inbox. You are able to get phones' IMEI, model, SW / HW revision and date, battery and signal levels.
SMSPlus edition allows to send Ringtones and Operator logos, read last dialed, missed and received numbers and names.

Oxygen SMS Gateway allows uninterruptable communication between people regardless of the service used. Current version supports two services: SMS and e-mail. It means that people having at least one of these services can communicate with each other.
The main advantage of Oxygen SMS Gateway over all other email-sms gating services is that the Oxygen SMS Gateway is bidirectional. You can send and receive SMS to e-mail address and vice versa.

TOxygenSMS component is designed to give an access to SMS and Calendar capabilities of Nokia GSM phone from a Windows program.
SMS section allows you to send simple text, Unicode strings, picture messages, ringtones, Operator Logos and CLI Logos; receive text and pictures; read and delete messages from inbox.
Calendar section gives you an opportunity to work with Nokia calendar entries. You're able to Read, Add, Update and Delete entries.