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!
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
GoodBarber - GoodBarber is a mobile app creation platform.
Fieldbook - Create a database, as easily as a spreadsheet
Mobidonia - Native mobile app builder for iOS, Android & Apple Watch
iotlist - Discover the internet of things