Lightest and smallest modem. Directly connects to computer. Ideal for travelers and laptop users:
ActiveXperts SMS Messaging Server is a Windows-based software package that enables you to send, receive and process SMS and e-mail messages. Supported communication protocols: GSM, HTTP, SMPP, SMTP, POP3. Incoming messages are processed by 'triggers', and can be fully customized.
It's a framework for any scenario where one/two-way SMS is required. Create a voting/polling system, send out mass SMS broadcasts, create a reservation system, etc.. Real-life case-studies are included as sample projects.