RestSMS app
RestSMS is Connectivity tool that is open source under the MIT license.The RestSMS-App allows you to send SMS via Webservice from your Android-Device. It will start a service you can then address via HTTP requests; by default, it will listen on http://127.0.0.1:8080/. Phone number of the recipient and message text are passed via POST parameters; a JSON response will be returned informing you of the success (or failure).