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CrunchBase is the free database of technology companies, people, and investors that anyone can edit.

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 ...

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

Intelligence on High-Growth Private Companies. Comprehensive profiles, real-time information, news and analytics on the companies you seek. Improve sourcing. Speed due diligence. Gather market and competitive intelligence.

VentureBeat Profiles is the best way to discover and research new top startups and companies. VentureBeat Profiles is a platform for our community to share, discuss, and evaluate information about these companies.

White Pages and Yellow Pages lookup. Reverse phone directory, address and phone number search. Other services include email lookup, reverse address, zip codes, city guides, public records, and background checks.

Free Games and Building Games! A virtual world for kids with user-created castles, cars, spaceships, swords, battles, trucks, zombies and awesome destruction. Build, battle, chat, or just hang out online.

Buy and sell websites and find websites for sale in the most active auction marketplace. Established websites and online businesses for sale on Flippa.

Prezi is the zooming presentation editor

Check out the Wonder How To community. Meet other curious viewers, curators and contributors for the best how to videos on the Web.

Bored with generic social networks? Come join the fun on hi5! Every day, millions of people meet up, hang out, play games and have fun on hi5. Check it out.

Diigo is a powerful research tool and a knowledge-sharing community