Glitch by Fog Creek
The domain is recycled from a former game site. Its shut down announcement might be worth reading along with the HN discussion:<p><a href="https://web.archive.org/web/20121117004246/http://www.glitch.com/closing/" rel="nofollow">https://web.archive.org/web/20121117004246/http://www.glitch...</a><p><a href="https://news.ycombinator.com/item?id=4786514" rel="nofollow">https://news.ycombinator.com/item?id=4786514</a>