phpMyAdmin - phpMyAdmin is a tool written in PHP intended to handle the administration of MySQL over the Web.
DbNinja - Web-based application for secure and efficient management of MySQL database servers
Adminer - Adminer (formerly phpMinAdmin) is a full-featured database management tool written in PHP.
MySQL Workbench - MySQL Workbench is a unified visual tool for database architects, developers, and DBAs.
dbMonitor - dbMonitor performs per-component tracing of commit, rollback, SQL statement execute, creating/destroying components, connection pooling events, etc.
MySql Lite Administrator - PHP web application that will help you insert and update stuff in your MySQL Database.