Betfair Java Sample Code by Betfair demonstrates a basic use case of placing a bet on the next GB Horse Racing market. A comprehensive description of the samples can be found in the developer samples documentation. This sample code is written in Java, and is related to the Betfair APIs.
Google has released version 3.0 of the YouTube Data API which includes new functionality and features including Topics API, Universal Search, Channel Bulletin Post, Full Subscriber List Management, and more.
Twitter recently added more data to each tweet it returns via the API. Now your applications can access the number of retweets, whether you have retweeted a tweet and additional information about the user who wrote the tweet. The new information used to require subsequent calls to the Twitter API, or perhaps looking up a cached value from your own database.