What's the best free online programming course you've taken?
Definitely one of my favorites is An Introduction to Interactive Programming in Python (Parts 1 & 2) from Rice University on coursera.org.
What I really liked about it is that it teaches you the basic elements of Python programming by creating interactive games.
Part 1 culminates in building a version of the classic arcade game "Pong" and part 2 culminates in building a version of the classic arcade game "Asteroids".
An Introduction to Interactive Programming in Python
What are some of your favorite programming courses?