SharePoint Framework Developer Preview
Building out the SharePoint User Experience
Integrate your sites, apps, and tools with SharePoint
Developers can integrate their own sites and tools with SharePoint via Add-ins. Administrators get targeted controls for granting specific access for add-ins, to SharePoint.
React to document additions and updates, and build processes around content
Webhooks in SharePoint are call-outs to web services developers can build, that let them respond to changes within documents and items in SharePoint.
Consistent APIs across all Microsoft productivity services, now including SharePoint
Use an array of SDKs across mobile and service platforms to access SharePoint data – or, just call the consistent REST-based APIs directly.