FreeProgrammingResources offer free MySQL tutorials.
WebDevelopersNotes also offers a free MySQL tutorial.
Tutorialized offer several MySQL tutorials, amongst other useful resources.
MySQL.com is home of MySQL® Database Server - The Foundation of MySQL Network and MySQL 4.1 which is the latest certified production-ready release.
HotScripts offer free Help Desk software - Help Desk Reloaded amongst other MySQL goodies.
PHPFreebies.com bring you free PHP and MySQL website scripts, such as the Clickbank Search Engine, FAQ Page Maker, Tell A Friend, testimonial Rotator and so on.
Weiheke in New Zealand offers a zip file packed with tried and tested PHP and MySQL scripts.