Free online courses from top universities.

MIT: http://ocw.mit.edu/OcwWeb/Global/all-courses.htm

Stanford: http://itunes.stanford.edu/

Princeton: http://www.princeton.edu/WebMedia/lectures/ (wheee, Martin Scorsese: "Discusses Film-Making")

Berkeley: http://webcast.berkeley.edu/courses/ and http://itunes.berkeley.edu

Purdue: http://boilercast.itap.purdue.edu:1013/Boilercast/

Carnegie Mellon: http://www.cmu.edu/oli/

Utah State: http://ocw.usu.edu/front-page/Courses_listing

Tufts: http://ocw.tufts.edu/CourseList

Johns Hopkins School of Public Health: http://ocw.jhsph.edu/topics.cfm and http://podcasting.jhu.edu/department.php

University of Washington Computer Science & Engineering: http://www.cs.washington.edu/education/course-webs.html

Harvard: http://athome.harvard.edu/

Openlearn: http://ocw.tufts.edu/CourseList

Connexions: http://cnx.org/content/browse_course_titles

Wikiversity: http://en.wikiversity.org and http://en.wikibooks.org