HEATKEYS

Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, upload an unlimited number of photos, post links and videos, and learn more about the people ...

foursquare

YouTube is a place to discover, watch, upload and share videos.

San Francisco - User Reviews and Recommendations of Top Restaurants, Shopping, Nightlife, Entertainment, Services and More at Yelp

Geocaching is a treasure hunting game where you use a GPS to hide and seek containers with other participants in the activity. Geocaching.com is the listing service for geocaches around the world.

Plan a trip with great travel recommendations from friends and people who travel like you. Collect and share where you

Socialbakers - Online Facebook statistics portal

Learn from fellow travelers about the attractions you should visit, the hotels you should stay in, and the restaurants you should experience.

Find cheap flights, hotels and car rentals with Yahoo! Travel. Plan your trip with travel guides, personalized recommendations, articles, deals and more.

Photo-sharing community. Discover the world through photos.

Flickr is almost certainly the best online photo management and sharing application in the world. Show off your favorite photos and videos to the world, securely and privately show content to your friends and family, or blog the photos and videos you...