Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Datomic - The fully transactional, cloud-ready, distributed database
Ragic - World's most advanced online database engine. Build powerful online databases with simple Excel style online interface.
Google Cloud Datastore - Cloud Datastore is a NoSQL database for your web and mobile applications.
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
Oracle TimesTen - TimesTen is an in-memory, relational database management system with persistence and...