Top 10 Tools for a Free Online Education

This March post from Lifehacker lists great tools for online education. If you want to learn to code, start learning a foreign language, master Ubuntu or more try this list of top ten online tools. As Lifehacker says, "It's easy to forget these days that the internet started out as a place for academics and researchers to trade data and knowledge. Recapture the web's brain-expanding potential with these free resources for educating yourself online."