FSI Courses

This is a fairly old link but it has a ton of great FREE materials - books and audio:

http://fsi-language-courses.com/default.aspx

It's actually the Foreign Service Institute. Their courses teach you the basics in a wide variety of languages. I've just started the Georgian module and although it's pretty basic it seems to be well put together. A great tool for beginner's or people just curious about various languages.