SmartSMS 

SmartSMS enables you to send Picture Messages, Caller Group Graphic, Operator Logos, Ringtones, EMS messages and FlashSMS direct from your PC to a GSM phone. Send using modem or Phone (connected through cable/IR/bluetooth) or Internet.
ringtones smartsms nokia ringtones ring tones sms gsm nokia ring siemens ericsson motorola gsmsoft ems logos

Text2GSM 

Send textmessage (SMS) from your PC to a mobile phone at any worldwide network. Perfect for handling alarm from other programs, thanks to the autosending feature and the possibillity to start the program with commando line arguments.
text2gsm sms gsm textmessages mobile mobile phones handphone cellular messages