Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Knack - Knack is the easiest, most spectacular business management software available.
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
AppGini - AppGini is a program that helps you develop web database applications instantly.
restdb.io - restdb.io lets you create databases and REST APIs quickly. Development databases are free. Powerful web-based and mobile-friendly data management.
QuintaDB - Solution for creating web forms and databases online where no progamming is required.