Select any country in the world and a live feed of relevant articles from Yahoo News pops up.
Will you have a beachfront property once the glaciers melt? This site uses NASA topographical data to show how coastlines will look with each meter of sea level rise.
You can't stumble around online without hitting a bar guide these days, but Mappy Hour is very efficient at finding the shortest path from you to cheap cocktails.
Thanks to Wired for the list.