Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
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.
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
MySQL - The world's most popular open source database
OutSystems - Build Enterprise-Grade Apps Fast.
Microsoft SQL - Microsoft SQL is a best in class relational database management software that facilitates the database server to provide you a primary function to store and retrieve data.