Facebook announced v2.6 of the Graph API. The version updates a number of Facebook services including Messenger, Facebook Live, Reactions, Video, Rights Manager, Facebook Ads, and Sharing across devices. As the backbone of Facebook's developer platform, Graph API updates draw much attention.
Twitter announced the Periscope Producer API, which will give third-party apps the ability to authenticate Periscope accounts and let people push live video from just about anywhere. The idea is to make it easier to share video from just about any device and reduce pain points for end users.