Introduction to Activism on the Internet - Cell Phones
http://www.backspace.com/action/all.php#cell_phones
Good overview of using different media for cyber activism. A little old so some info may be outdated. The author has built websites for human rights orgs, including Tibet.com (http://backspace.com/is/in/the/house/work/)
John Emerson
: January 2005
services
ClickaTell
http://www.clickatell.com/
"Any message, anywhere". Global message service - range of API interface options to connect to their global messaging gateway, web-based and PC-installed applications for managing contacts and sending SMS messages at the click of a button.
ClickaTell
: June 2009
systems
PlaySMS
http://playsms.sourceforge.net/web/
A flexible Web-based Mobile Portal System that can be made to fit to various services such as an SMS gateway, personal messaging systems, corporate and group communication tools. PlaySMS is a full-featured SMS gateway application that features sending of single or broadcast SMSes, the ability to receive and forward SMSes, an SMS board, an SMS polling system, SMS customs for handling incoming SMSes and forwarding them to custom applications, and SMS commands for saving/retrieving information to/from a server and executing server-side shell scripts. Gateway modules for Clickatell, Gnokii, Kannel, others.
PlaySMS
: 2008