inicrond is a education-oriented content management system. It is written in php and supports MySQL. Go on the freshmeat site for more details.
Inicrond : Network of Interactive Courses Registred On a Net Domain
An web system for small university courses, typically postgrad. Simple to install/maintain, easy for "teachers" with any scripting skills to extend. Alternative to big-iron VLEs/LMSs. Forums, quizzes, timetables, cms, year and user management, etc.