Adminer (formerly phpMinAdmin) is a full-featured database management tool written in PHP. Conversely to phpMyAdmin, it consist of a single file ready to deploy to the target server. Adminer is available for MySQL, PostgreSQL, SQLite, MS SQL, Oracle, Firebird, SimpleDB, Elasticsearch and MongoDB.

Go to https://github.com/vrana/adminer/tree/master/designs for themes

Plugins: https://github.com/vrana/adminer/tree/master/plugins