Academic Earth
More than 1,500 video lectures by professors from Harvard, Yale, broken down into single classes on topics like art, architecture, and astronomy. Free.
How Cast
Free learning site divided into categories like environment, first aid, and parenting. Experts share their knowledge in videos that cover everything from surviving heart attacks to playing charades.
iTunes U
More than 350,000 free video lectures.
Khan Academy
Tools for kids and adults in single, short lessons on a neon blackboard. More than 20,000 free videos.
Lynda Software Training*
Software training & tutorial video library.
