HEATKEYS

Showsites - A Free SEO tool that provides free website analysis, traffic details, rankings, contact email ,similar site, same owner site , same ip site, optimization and promotion reports.

BestReviewDomain - best review and free analytic for webmasters that gathers detailed information on your domain : traffic details, Technology language, whois, ranking info, domain backlinks,domain IP, DNS record, optimization, network tools, seo too...

foursquare

Offers bookmark synchronization, search enhancement and web discovery based on sites bookmarked by users.

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

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.

Walk Score calculates the walkability of any address. Walk Score helps you find a walkable place to live.

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.

Vimeo is a respectful community of creative people who are passionate about sharing the videos they make. We provide the best tools and highest quality video in the universe.

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

Academia.edu helps academics follow the latest research.