LinkedIn strengthens and extends your existing network of trusted contacts. LinkedIn is a networking tool that helps you discover inside connections t...

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 fr...

MerchantCircle is the largest social network for local business owners. Services include free online business listings, free marketing tools, interne...