As a developer, you can figure out how to make your program connect to Facebook, Twitter, SMS, and Email. Or you can use the Embarke API and connect just to Embarke, a messaging platform that connects you to them all. You can skip learning the specifics of how to connect to each of them. The REST API's website has a five minute tutorial video on how to use this gateway to its developer tools for social communications.
We've added seven APIs to the ProgrammableWeb directory today in several categories including Media, Energy, Products, and Messaging. Included is a set of APIs for MoEngage, which helps developers engage users via push notifications. Here is a summary of the API directory additions.