Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
LibreOffice - Base - Base, database, database frontend, LibreOffice, ODF, Open Standards, SQL, ODBC
Knack - Knack is the easiest, most spectacular business management software available.
AppGini - AppGini is a program that helps you develop web database applications instantly.