The Twilio PHP Helper Library allows developers to issue requests to the Twilio API from PHP code. This library can be installed via PEAR, ZIP file, or Composer. Quickstart tutorials are available to help developers get going.
BroadSoft's recent announcement of their new RESTful API and the supporting mashup contest is another sign that larger telephone operators will soon support "Web as a Platform" application development.
Diffbot has just announced the release of brand new client libraries for 35+ different programming languages. The company now provides developers client libraries for the Diffbot API in the most-used programming languages as well as languages that are not as common.
In a first for US mobile carriers, Sprint has opened up an initial set of REST services for developers to play with for free at their new developer sandbox. With these services (Sprint API profile), developers can now access location, simple presence, and send SMS messages to Sprint handsets without requiring any software installed to the device.