Apache UserGrid - Usergrid is an open-source BaaS enabling developers to rapidly build web and/or mobile applications.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Baqend Platform - Baqend is a Backend-as-a-Service for web and mobile apps.
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
ApiOmat - ApiOmat is a Mobile Backend as a Service enabling organizations to integrate their enterprise IT systems with mobile devices and wearables.
QuickBase - Quickbase provides a no-code operational agility platform that enables organizations to improve operations through real time insights and automation across complex processes and disparate systems.