Geography

Updating Population Map & Population Statistics
http://www.breathingearth.net/

Digital population statistics
http://discoverdigitallife.com/

Life expectancy
http://www.worldlifeexpectancy.com/

What number are you? one in 7 billion
http://www.bbc.co.uk/news/world-15391515

Online Pedometers
Where's the path
Not only does this allow you to plat a route, which it then shows the distance and elevation, but you have a choice of maps, two of which show at any one time.
http://wtp2.appspot.com/wheresthepath.htm

Map My Run
An on-line pedometer. Draw on your route and get the distances, elevation etc.
http://www.mapmyrun.com/

Compare Two maps Together
http://wtp2.appspot.com/wheresthepath.htm

http://tools.geofabrik.de/mc/?lon=7&lat=43&zoom=2

http://www.jonasson.org/maps/

Make an Envelope from a Map
http://mapenvelope.com/

Various Map tools

Shipping simulator
http://www.planetinaction.com/ships15/
Tom Scott Real world racer
http://www.tomscott.com/realworldracer/

Google Goggles
http://www.isoma.net/games/goggles.html

Web cams
http://www.webcams.travel/