The Betfair C# Sample Code by Betfair demonstrates how to interact with the API. It aims to simplify understanding using a console application. The code shows sent requests and JSON responses. Resources display how to run the example with .NET installed. Added to the official site by Gordon Mack.
FantasyData.com, NFL statistical data provider, offers the FantasyData NFL API. The API gives developers access to NFL data (e.g. team stats, live scores, season information, box scores, and more). The API targets web and mobile app owners who develop apps for the fantasy football market. Many of the most popular fantasy football apps have already integrated with FantasyData's APIs.
Roar Engine selected Urban Airships push-messaging system to complement its cross-platform game mechanics and virtual products management API. The Roar Engine API will itself integrate with the Urban Airship API to send notifications to gamers.
We had a look at the Ergast Developer API , which basically covers car racing for Formula 1 enthusiasts and an interesting mashup using the Shiny statistical platform for web applications. We also had a look at the ESPN API which covers the Formula 1 sport but also the NASCAR racing.