Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
Apache UserGrid - Usergrid is an open-source BaaS enabling developers to rapidly build web and/or mobile applications.
MongoDB Stitch - The serverless platform from MongoDB
Baqend Platform - Baqend is a Backend-as-a-Service for web and mobile apps.
AWS Mobile Services - Storage, Analytics, Push Notif. & SMS Delivery SDKs
ApiOmat - ApiOmat is a Mobile Backend as a Service enabling organizations to integrate their enterprise IT systems with mobile devices and wearables.