There was a website where it tasked you making different geometric shapes using only a compass and straightedge.
I've looked for it and I can't find it or even discussion about it. What I do remember is talk that it might be taken down, but it'd be nice to at least find that discussion. Any help on the project's name or its URL?
http://sciencevsmagic.net/geo/ maybe? It's a puzzle similar to Euclid: The Game. I first saw this about a year ago, so I don't know anything about its developments.