Who knows what the name of this site is?

Okay, I'm lost. A while ago I stumbled across a pretty awesome website where you can choose certain categories where you have to type the right countries that begin with A, B, C etc.

There was another one on that same site where you had to type all the codenames from A - Z - Alpha, Bravo, Charlie etc.

If you know the name of this site, please let me know.