I'm not affiliated with this project, just caught my eye.

It's not a full-fledged PHPMyAdmin alternative (yet). Interface seems non-intimidating and immediately usable, so for that it might be handy for basic MySQL needs.

Not open source. But free for non-commercial use, $25 otherwise. If it inspires an open source MySQL GUI to think critically about UX then that would be just great.

Yep, looks promising. Really like that you don't have to configure anything. Just upload, enter user/pass and works.

Webmin includes a very competent MySQL administrative module (likewise PostgreSQL), though until we release the new UI, it seems a little clunky (better than phpMyAdmin, IMNSHO, but still old school web 1.0 style).

Extensive documentation, including screenshots:

http://doxfer.com/Webmin/MySQLDatabaseServer

And, for the folks running PostgreSQL, and don't like being in the ghetto without good GUI tools:

http://doxfer.com/Webmin/PostgreSQLDatabaseServer

I've done a little SQL console with syntax highlighting fro my own needs.

http://github.com/slim/bazdig/tree/master

you need PHP5 and PDO_SQLITE though

phpminadmin is another alternative. one file, many functions, open-source. http://phpminadmin.sourceforge.net/phpMinAdmin.php

good find.