Maps

123. Google Maps
http://maps.google.com/
Web | Mobile
There isn't much left you can't mash-up with a Google Map, or that Google hasn't mashed up itself (the latest: Google Maps Biking Directions). It's available as a free app on most smartphones, too—naturally, it's big on Android phones where it powers the GPS navigation and offers real-time traffic reports.
• Read PCMag's review of Google Maps.

124. Google Earth 5.0
http://earth.google.com/
Windows | Mac | Linux
This is so much more than just Google Maps in a desktop app. Earth is a virtual exploration app that lets you explore not just the surface of the planet, but also the ocean floor and the sky. Google Earth can even take you on a quick trip to Mars, or back in time via historical satellite images.
• Read PCMag's review of Google Earth 5.0.

125. Nokia Ovi Maps
http://www.maps.ovi.com/
Web | Mobile
When accessed on Nokia phones, this GPS app and map site offers very accurate navigation with voice-enabled, turn-by-turn instructions.