The Yahoo Fantasy Sports Ruby Library by Mark Borcherding is a Ruby client library and resource for use interaction with the Yahoo Fantasy Sports API. Yahoo Fantasy Sports is the world's largest fantasy sports provider, allowing users to compete against each other using statistics from real-world competitions. The Yahoo Fantasy Sports API provides rich data on leagues, teams and player information.
ArenaNet, developer of the popular online role-playing game Guild Wars 2, is working on the implementation of OAuth2 and plans to release new authenticated Guild Wars 2 APIs in 2014. ArenaNet also plans on adding a Leaderboards API that will give developers programmatic access to the same leaderboards data that ArenaNet used to create its Guild Wars 2 leaderboards site.
If math is about measurement, then Mathletics may have your child's number. Much like games that post the best scores of players, the Mathletics SOAP API makes student scores accessible to programs as well as its website.