Language Study Site

I ran across this site:

http://www.masteranylanguage.com/

Which has a large selection of languages. From what I've seen so far it looks like a really great resource. It includes all sorts of vocabulary categories with flash cards/games. Some languages even include audio of songs in the language and videos. Obviously some languages have more resources than others in terms of audio etc. but for the most part all the vocab and quizzes that accompany even the lesser known ones seem to be pretty useful.