Toad Edge - Windows GUI for MySQL. SQL Syntax Check. Freeware (Basic Features) & Payware (Extended Features).

Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.

InterSystems IRIS - InterSystems IRIS Data Platform sets a new level of performance for rapidly developing and deploying applications. Learn how it can help your organization.

Knack - Knack is the easiest, most spectacular business management software available.

Apache MetaModel - Non-Native Database Management 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.