MySQL Workbench - MySQL Workbench is a unified visual tool for database architects, developers, and DBAs.
DBeaver - DBeaver - Universal Database Manager and SQL Client.
OpenDBViewer - OpenDBViewer is a simple database explorer for Windows, Linux and Max OS X.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
DbGate - Open Source Database Manager for SQL Server, MySQL, PostgreSQL, SQLite, MongoDB, Redis and more
Ocelot GUI - GUI client for MySQL or MariaDB, including debugger - ocelot-inc/ocelotgui