Adminer is a management application to work with databases and supports MySQL, PostgreSQL, MS SQL, SQLLite, Oracle, MongoDb and more.
Was designed to replace or to be better than the most popular phpMyAdmin (already included in many server distributions) and it supports more types of databases, allows to create and edit tables, use indexes, foreign keys, full support for triggers, routines and events.
Allows customizations through PHP classes, does not need any configuration, it has a small size and interface is translated in many languages.