An app which allows you to send SMS messages via an HTTP request.
Connect the phone to WIFI to get an IP address, open the app and
find out the address of the new SMS server. Browse to the address
for more instructions, or simply make a request to
http://address/?number=1234&message=my%20new%20message to send
an SMS via the phone. The app also stores a log of sent SMS
messages, and listens to WIFI changes to automatically reconnect in
case of a change. Longer SMS messages are automatically split to
the allowed length.