The facebook-node-sdk by amachang allows developers to implement Facebook API functions using Node.js. It supports the Facebook Graph API, Facebook Query Language (FQL), and REST API. This SDK is compatible with Facebook's official PHP SDK.
In an apparent effort to improve its developer relations, Twitter has announced its plans to build what it calls "the next generation of the Twitter API." The first step: a new program called Twitter Developer Labs, which will allow developers to test and provide feedback on new API features.