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Higher education search engine and directory of world universities and colleges. 4icu.org includes 10,000 college and university reviews and web rankings in 200 countries.

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 ...

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

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

foursquare

LinkedIn strengthens and extends your existing network of trusted contacts. LinkedIn is a networking tool that helps you discover inside connections to recommended job candidates, industry experts and business partners.

Classbase is an education community and resources database where you can find information on education and academic institutions in any country.

An index of current online research in Philosophy. Also contains bibliographies, discussion forums, and advanced research tools for researchers.

Twitter is without a doubt the best way to share and discover what is happening right now.

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.