VbSMS is designed to Send SMS messages through GSM phones connected to your PC/server by Infrared, Bluetooth or data cable. Samples provided for Visual Basic, Visual C# .NET.
Wireless Dev Studio is an ActiveX DLL that allows you to send and receive SMS (also binary, flash, Unicode (UCS2) and ultiple SMS) through GSM modems. It handles voice and GSM data calls and the phonebooks of both SIM and terminal.