Moodle: www.moodle.org

More Open-Source LMSes Licensed under the GPL:

ATutor: PHP, MySQL, Ver. 1.4 (May, 2004): www.atutor.ca

Claroline: PHP, MySQL, Ver. 1.5RC (May, 2004): www.claroline.net

DotLRM: OpenACS, Ver. 2.0.2 (Mar. 2004): www.dotlrn.org

Eledge: Java, MySQL, Ver. 3.1.0 (Oct. 2003): eledge.sourceforge.net

Fle3: Zope, Ver. 1.4.5 (Nov. 2003): fle3.uiah.fi

ILAIS: PHP, MySQL, Ver. 3.0.0 (May, 2004): www.ilias.de/ios/index-e.html

Interact: PHP, MySQL, Ver. 1.8.7 (Apr. 2004):
cce-interact.sourceforge.net

Manhattan: CGI, C, Apache Ver.2.4, (May.2004): manhattan.sourceforge.net

SpaghettiLearning: PHP, MySQL, Ver.1.1RC (Apr. 2004):
www.spaghettilearning.com

Whiteboard: PHP, MySQL, Ver. 1.0.3, (Aug.2003):
whiteboard.sourceforge.net

For More LMSes See:

UNESCO Free Software Portal:
www.unesco.org/webworld/portal_freesoftware/Software/Courseware_Tools

EdTechPost:
www.edtechpost.ca/pmwiki/pmwiki.php/EdTechPost/OpenSourceCourseManagementSystems

e-Learning Center:
www.e-learningcentre.co.uk/eclipse/vendors/opensource.htm

To compare LMSes see: www.edutools.info/course

To try out some LMSes and several other PHP/MySQL-based content
management systems without having to install them first see:
www.opensourcecms.com