What is Frontline SMS?
from FrontlineSMS site
A lack of communication can be a major barrier for grassroots non-governmental organisations (NGOs) working in developing countries. Frontline SMS is the first text messaging system created exclusively with this problem in mind. By leveraging basic tools already available to most NGOs — computers and mobile phones — Frontline SMS enables instantaneous two-way communication on a large scale. It’s easy to implement, simple to operate, and best of all, the software is free.