Facebook Design - Devices - Images and Sketch files of popular devices.
Datomic - The fully transactional, cloud-ready, distributed database
Design Cell - Beautiful multipurpose mockups for iOS
Datahike - A durable datalog database adaptable for distribution.
Device Shots - Generate high-resolution device mockups using a screenshot.
Google Cloud Datastore - Cloud Datastore is a NoSQL database for your web and mobile applications.