The Slack Go SDK by Norberto Lopes communicates with the API to implement real time messaging features into an application. The project supports the majority of the REST calls and the real time messaging protocol over Web-socket.
Every single public message on Google Buzz, the content-sharing platform from the search giant, is now available to any developer. A similar, if much fatter, pipe is available from Twitter, but only for large partners paying big bucks. Accessing the "firehose" is about the same any other API, which makes it an easy way to get a lot of content quickly.
Back in July, ProgrammableWeb reported that Dropbox had launched a beta version of the Dropbox Datastore API which provides a new method of syncing and storing data on Dropbox. Dropbox has just announced that the Datastore API is now out of beta and the first stable version of the API has been released.
After a year plus deprecation period and one extension to the official cutoff date, Dropbox has officially retired the Dropbox API v1. v2 has been live for quite some time and Dropbox has been promoting its consistency, simplicity, and scalability to entice developers to move to the new platform.