Microsoft announced availability of the ORTC API preview for Edge. ORTC API support is not yet available in other browsers which may pose some difficulties for app developers.
At YourTrove, a lot of what we do involves ingesting social content via APIs and then regularizing that data within our system. For a lot of data, this is pretty straightforward. For example, while Facebook and Flickr might return different meta data, or name fields differently, no one disagrees that a photo is a photo. This is true for essentially all uploaded binary user generated content.
Mertech has launched a multilanguage, multiprotocol API development tool aimed at the SMB market. Named Evolution, the tool allows Windows apps to be consumed as a service.