The Nexmo SMS API is a service that allows you to send and receive SMS messages anywhere in the world. Nexmo provides REST APIs, but it's easier to use their official Java SDK. This tutorial covers how to send and receive SMS messages with the SDK so that you can use them in your applications.
Salesforce has introduced a new Apex Metadata API for Force.com to help developers build self-configuring applications, upgrade scripts, and custom set-up user interfaces. The API allows applications to enable capabilities such as retrieve metadata synchronously and set up a callback on completion.