Apache UserGrid - Usergrid is an open-source BaaS enabling developers to rapidly build web and/or mobile applications.
Siberian CMS - Siberian is an Open-Source and Free App Maker. Unlimited Push Notifications. Unlimited features. Fully Customizable. Download it and build your own app now!
AnyPresence - AnyPresence is an Enterprise Backend as a Service for mobile app development and API augmentation.
GoodBarber - GoodBarber is a mobile app creation platform.
Apps Panel - Apps Panel is a mobile backend-as-a-service enabling developers to manage their mobile development process.
Bizness Apps - Create your own app or become a reseller and build apps for others