CellGuided is a modern version of traditional treasure hunts. Use a mobile phone to receive directions and solve clues. Any mobile phone will work! No need to fiddle with GPS, SMS, installing applications, etc.

With CellGuided you can create routes, share them with your friends or publish them for all to enjoy.

Read more about it here.

The Gaiagi Photo Explorer shows photos from flickr and Panoramio tagged with geo locations on Google Maps. It has a convenient interface to zoom into locations of photos as well as links to the original photo pages at the photo services.

You can move from one photo to the next easily and load new photos for the map area selected. Local search from Google enables to easily select a new location and display a brand new set of photos.

Read more about it here.

The concept is pretty simple. Just like MapQuest, Google, Microsoft, and other mapping programs, Ride the City finds the shortest distance between two points. But there are two major differences. First, RTC excludes roads that aren’t meant for biking, like the BQE and the Queens Midtown tunnel. Second, RTC tries to locate routes that maximize the use of bike lanes and greenways.

Read more about it here.

Walk Score launched in July of 2007 and over 100,000 people visited the site on launch day. Since then, almost 6 million addresses have been served and Walk Score has been featured in over 500 newspaper articles and 50 TV segments.

Read more about it here.

This project is an attempt to gather data from various free and open aerial imagery datasources around the world, and use them to create a single, coherent open world view.

Read more about it here.

The original idea was to build a web service designed to serve isochrone and isodistance polygons. The final purpose of the application, which is an implementation of the web service, is to display bakeries locations within isochrone (or isodistance) polygons, centered around a user-defined point. Users can then get the shortest path to one of the bakeries.

See more about it here and here. Read more about it here.

Renting an apartment in New York City is expensive, time-consuming, and chaotic. It’s our goal to fix these issues by creating a free listing service where the community has a voice and trustworthy brokers are rewarded. We’re building a set of tools so you can quickly assess a property by map, transportation routes, local interest information, pictures, and opinions shared by fellow apartment hunters. Since most of New York’s apartments can be found through a broker, it’s important that you connect with one you can trust. We’re giving the community a voice by asking them to share their views on individual listings and the brokers they’ve worked with so you can get a better understanding of what’s available.

Read more about it here.

We are a social platform that automatically updates a person’s gaming status in real-time, so when your friends start playing a game, you will know about it instantly. Raptr also aggregates your real-time gaming activity on the PC, Xbox Live, Mac, flash games, Steam, World of Warcraft, and many other games and platforms. It is an automated process, so once you input your details of a game or platform, Raptr will automatically keep up with your activity from that game.

Read more about it here.

With HoudahGeo you may “pin” photos to locations where they were taken.

Just like an expensive GPS camera, HoudahGeo may store latitude, longitude and altitude information right within the image file – invisibly with no loss of quality. HoudahGeo writes EXIF, XMP and IPTC tags.

HoudahGeo also lets you to share your geotagged photos in Google Earth or publish them to Flickr.

Read more about it here.