Adminer is a great alternative to phpMyAdmin. It's a single PHP file, so it's easy to install. The UI is simpler and more intuitive than phpMyAdmin, and Adminer has full support for features like foreign keys, grouping
SELECT results, sorting results by multiple columns, easy downloading of blob field contents, editing fields in multiple rows. Adminer can work with MySQL, PostgreSQL, SQLite, Microsoft SQL Server, and Oracle Database, whereas phpMyAdmin supports only MySQL. Adminer even works with older versions of MySQL (4.1 and later) and PHP (4.3 and later).
-- High Mobley