Book Mooch

My sister recently told me about BookMooch, which is basically a book exchange site. List book syou have to give away by title or ISBN and search for books you want. You get a credit for each book you send which you can then spend to have books sent to you. It's all automated so you may send a book to one person and recieve it from someone else entirely. You only pay for shipping.

Geography

I recently ran into a couple of cool geography quizzes

The first gives you 10 Minutes to come up with all the states in the US

The second site has more global areas you can select from and the UI leaves something to be desired but it's fun nonetheless.