The FamilySearch C# SDK by FamilySearch communicates with the API via NuGet. It provides usage and example available at https://github.com/FamilySearch/gedcomx-csharp/tree/master/FamilySearch.Api#examples
Microsoft continues to built out its cogitative services API portfolio with two more APIs now generally available. The Bing Custom Search API and v7 of the Bing Search API are both GA and ready for production use. The Customer Search API enables targeted searches, and v7 adds filtering.
With the rise in big data, organizations are constantly looking to analyze the large amounts that is being generated. The challenge is not just to analyze the large data but also be able to visualize this in almost real time. Topsy, the company that currently manages the largest index of public social data on various networks like Twitter and Google Plus, has released Topsy Pro Analytics (check out the Topsy API) that addresses both those points and gives organizations a powerful analytics tool to gain insight into historical and real-time Twitter data.