Notix.co - NOTIX is an audience re-engagement service based on web and in-app push notifications that work for both desktop and mobile devices.
Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
restdb.io - restdb.io lets you create databases and REST APIs quickly. Development databases are free. Powerful web-based and mobile-friendly data management.
Appcelerator - Native apps, Mobile APIs, Real-time analytics, One Platform.
RemoteStorage - An open protocol for per-user storage OWN YOUR DATA
Cloud CMS - Cloud CMS is a headless, API-first approach to content management, built around JSON. It delivers enterprise features, Git-like versioning, content models, allowing your business users create, manage and publish fresh content with ease.