pdoAdmin is a web based GUI to manage MySQL and MariaDB databases. It is released under the terms of the MIT License. This code is developed and maintained by jReply LLC.
You can try out McAdmin at http://jresponse.co/pdoadmin
This code requires the PDO extension. Needless to say, you need to have a MySQL or MariaDB server running.
The GUI will only work in Chrome and recent versions of Opera.
Just download the source code to a folder on your server and browse to it after having inserted your own database password on Line 20 of php/utils.php .