DBeaver - DBeaver - Universal Database Manager and SQL Client.
DbNinja - Web-based application for secure and efficient management of MySQL database servers
MySQL Workbench - MySQL Workbench is a unified visual tool for database architects, developers, and DBAs.
Adminer - Adminer (formerly phpMinAdmin) is a full-featured database management tool written in PHP.
Sequel Pro - MySQL database management for Mac 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.