Send and receive text messages with Drupal using Tropo's global cloud communications platform.
This module works with the SMS Framework module to allow mobile users to easily interact with Drupal sites. And because Tropo can do voice, instant messaging, and Twitter, too, a small patch for SMS Framework is included that lets you add multi-channel communications capabilities to Drupal.
A Tropo account is required, and Tropo is 100% free for developer usage. Tropo provides you with a phone number that can send and receive SMS internationally, allowing you to be up and running in minutes.