This library provides a pure Java interface for the Twitter API. Twitter exposes a web services API (http://twitter.com/help/api) and this library is intended to make it even easier for java programmers to use.
Social movie review web site FilmCrave recently released a new API (our FilmCrave API Profile) that provides developers with access to various types of content, including member movie reviews, movie plots, and movie ratings. Originally developed as an API for use by one of its business partners, FilmCrave decided to make the API publicly available in order to encourage third parties to integrate FilmCrave's content with other web sites.
I'vRead is a service for keeping track of what books you've read. Seems simple, but it can be rather useful for those of us obsessed with reading like myself. Its web site offers the service for free, and using it is already pretty simple. There isn't even another account to register for. All a user needs to do is add a specific tag, @ivread, to a Twitter post mentioning the book. It allows for some basic searches of the data on their website, but the I'vRead API is where the service really shines.
LinkedIn, the social network for business, has announced an enhanced version of its People Search API. While the V1 Search API contained some powerful and easy-to-use features, the latest additions for the new API are quite impressive.