The Nexmo SMS API lets you send and receive text messages around the world without having to worry about which carriers the recipients are subscribed to. This tutorial shows you how to use the Nexmo C# Client Library to send and receive SMS messages from your ASP.NET MVC web app.
Google intends to shut down the Google Hangouts API on April 25th. The change means developers will not be able to create new apps using the API, and any existing apps that rely on the API will effectively be left for dead on their feet. Why? So Google can further refine Hangouts for the enterprise.