SQL Rabbit is an open source PHP script to easily browse SQL Databases. For now, only mysql is supported.

source code
Source code(PHP) is available at github
Also avialable in node and python/flask
main features
  1. Clutter-free and intuitive interface
  2. Can navigate the database structures and issue your own SQL commands
  3. Simple implementation – only 500 lines of PHP code
Demo!
The demo shows databases of few open source systems such drupal, wordpress and joomla.It is best viewed with chrome.