The FJR.Sms library and FJR.SmsManager was originally written (by me) back in 2005, and has been collecting dust since then. However, after getting a question on StackOverflow I decided to refactor & release this under the MIT-license (see MIT.txt). Copyright © 2011 by Fredrik Johansson Robotics AB.
For questions, updates & more (although I release this AS-IS), please visit https://www.johanssonrobotics.com.
Is a simple (but decent) SMS library written in C#. Use it together with a phone, connected to a COM-port (COM1, COM2, COM3, etc) to send SMS-messages!
Windows-forms application that demos how to use the FJR.Sms library.