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.
Active development on Google Wave, a collaboration tool that used features of email, chat and document sharing, has been shut down. Google announced that the chief reason for discontinuing Wave was the low user adoption. The platform will live on within other Google projects, as well as the many portions of Wave that have been open sourced.
User authentication in apps is a pain, even if you've built an authentication system dozens of times. Forms, sessions, user tables, validation, password management, the list goes on in the seemingly never-ending to-do list for setting up a simple signup, login, and logout system for your app. OpenID company Janrain makes it easier, building on top of social networks.