The Playtomic C# SDK by Playtomic allows to integrate video game features into Windows 8, Windows Phone, and Mono Touch because it has been tested with Xamarin and Visual Studio. With the kit and API interaction, developers can access players subscription, achievement list, and activity stream.
Did you ever want to have a quick-and-easy way to test-out an API without having to write code? Now with the YouTube API you can. They now offer developers this web-based interactive form which lets you explore and interact with the YouTube API. You can setup and test API calls directly: choose operations, specify parameters, and see the Atom, RSS or JSON results.