NocoDB

MariaDB Server is one of the most popular open-source relational databases. It’s made by the original developers of MySQL and is guaranteed to stay open source.

SeaTable is a spreadsheet/database like Airtable. It helps to manage different kinds of data in a single platform. With built-in automation rules, scripts, and APIs, you can automate data processing with no code or little code.

KEXI is a visual database applications creator for designing database applications, inserting and editing data, performing queries, and processing data.

Base is an open-source, full-featured desktop database front end that is part of LibreOffice's office suite. Base caters to power users and enterprise requirements, providing native-support drivers for some of the most widely employed multi-user database engines.

Base is an open-source, fully featured desktop database management system, a part of the Apache OpenOffice suite. Base offers wizards to help users new to database design (or Base) to create tables, queries, forms, and reports.

Airtable is a cloud-based project management solution that uses a spreadsheet format to organize data.