Adminer is a full-featured, single-file PHP database management tool for administering MySQL, PostgreSQL, SQLite, MS SQL, and more, with optional plugins for extra backends.

7.9k stars1.2k forkslast commit Actively maintained
Chat2DB is a cloud-based AI database client that connects to databases, lets users browse schemas, and generates or executes SQL via a conversational chat interface. It supports query generation, result inspection, and basic data management operations.
Adminer is a full-featured, single-file PHP database management tool for administering MySQL, PostgreSQL, SQLite, MS SQL, and more, with optional plugins for extra backends.

7.9k stars1.2k forkslast commit Actively maintained
CloudBeaver is an open-source, web-based database manager for teams, offering a browser SQL editor, data browsing/editing, and administration for many databases.

5.1k stars558 forksApache-2.0last commit Actively maintained
WebDB is a lightweight web database client for browsing, querying, and managing SQL databases from a modern browser-based UI.
Activity unknown
Visual DB is a browser-based database client for exploring schemas, running SQL queries, and managing multiple databases with a modern UI and team-friendly sharing.

Activity unknown
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 2 of 4 shipped a commit in the last six months. Licences in this list: Apache-2.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Relational Databases.