The official Google Earth plugin is one free download that makes all sorts of cool stuff possible in your browser. There's a full screen version of the program (complete with underwater views and 3D buildings) which can be searched by entering queries at the end of the URL. There's a framed version with support for layers, historical imagery, day/night cycles, and the Google Sky starmap. Less useful but more fun are Google's collection of "experiments" demonstrating the possibilities of the Earth API, including a "Geo Whiz" geography quiz, an antipode locater, a 3D first-person view of San Francisco, a virtual route-follower, and MONSTER MILKTRUCK!, a crazy fun driving simulator that lets you careen a virtual milk truck through the Googleplex campus, ricochet off the Himalayas, or explore any other place you care to name. Lots more can be found in the Google Earth Gallery -- highlights include a look at mountaintop removal mining, a real-time flight tracker, a guide to trails and outdoor recreation, a 360 panorama catalog, geotagged Panoramio photos, and the comprehensive crowdsourced Google Earth Community Layer. And while it's too large to view online, don't miss loading the Metafilter user location map into a desktop version of Google Earth! [more inside]
posted by Rhaomi on Jun 9, 2011 - 15 comments

Free Poverty. Kinda like freerice.com but they're giving water to places that need it. [more inside]
posted by Nauip on Oct 17, 2008 - 32 comments

Place Spotting ― Try to solve this Google map quiz. In the upper part of the page you see a satellite picture. Drag and zoom the map in the lower part of the page until it shows the same location as the upper map. Here's how.
posted by netbros on Aug 16, 2008 - 32 comments

Cute quiz: Name the Simpsons characters. Also: US states, countries in Europe, Asia, North and South America, periodic table of elements. More.
posted by goodnewsfortheinsane on Jun 25, 2008 - 75 comments

Statetris is Tetris with European countries or American states as blocks.
posted by goodnewsfortheinsane on Aug 7, 2007 - 28 comments

Test your knowledge of world flags. 15 per round, 10 minutes per round. Some clues available, annoyingly addictive.
posted by moonbird on Jan 2, 2006 - 37 comments

Place the State. How well do you know the fly over states?
posted by jonah on Dec 7, 2004 - 103 comments

Geography Humiliation Central: Too many damned What a wonderful diversity of countries! A very annoying stringent set of tests, designed to expose showcase our ignorance knowledge of the political geography of the world we live in. Whether it's Africa, Asia or even Europe, South America or the United States, I seem to know only the really big ones them all. In fact, I've never been so ashamed proud in my life.
posted by Carlos Quevedo on Apr 9, 2003 - 51 comments