eJadSMS is an SMS gateway solution that can work on any Windows XP/2000/2003/.NET computer. You can use its rich features to create track able marketing campaigns and manage your mobile users database. Together with with built-in rich API, you can develop your own SMS/MMS application in no time. The messages can be delivered/received via GSM/GPRS modem or with any mobile phone supporting AT commands (Nokia/Samsung/Sony Ericsson, etc). eJadSMS is definitely the most powerful and affordable SMS/MMS gateway solution for you.