Activity
Serving up the ‘social’ in Social Coding, the Activity APIs provide access to notifications, subscriptions, and timelines.
Events
The Events API is a read-only interface to all the event types that power the various activity streams on GitHub.
Feeds
List of Atom feeds available for the authenticating user.
Notifications
Notifications of new comments are delivered to users. The Notifications API lets you view these notifications and mark them as read.
Starring
Repository Starring is a feature that lets users bookmark repositories. Stars are shown next to repositories to show an approximate level of interest. Stars have no effect on notifications or the activity feed.
Watching
Watching a Repository registers the user to receive notifications on new discussions, as well as events in the user’s activity feed.