Can you name the historical figures from Tweets they might have sent? - sporcle
A hilarious example of combining a trendy tech with learning. The graphic style may not look like much, but the functionality of the page is actually way above average.

Can you name the countries of Europe? - sporcle

OK, I didn't do so good. But this is a pretty good interactive!
There are lots more Sporcles, some better than others. How do you do?