Great Metro Apps

I have just purchased the Surface RT a few hours ago (figured I'd save some money considering the price of the cheapest new Surface is $499 and has had considerably minor hardware changes), and now I'd like to get a few nice Metro apps to make the best of my MS experience. As always, any and all help is appreciated. As a side comment, I'll review/discuss my experience In few weeks as some one who has had a "Google only" experience for quite a while.