SQL School - Data analysts training data analysts
DBeaver - DBeaver - Universal Database Manager and SQL Client.
phpMyAdmin - phpMyAdmin is a tool written in PHP intended to handle the administration of MySQL over the Web.
DataGrip - Tool for SQL and databases
DrawSQL - Easy database diagrams. Create, visualize and collaborate on your database entity relationship diagrams.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.