BNI - Business Network International

BNI is the largest business networking organization in the world. It offers members the opportunity to share ideas, contacts and most importantly, business referrals. BNI provides a structured and supportive system of giving and receiving business. It does so by providing an environment in which you develop personal relationships with dozens of other qualified business professionals. By establishing this "formal" relationship with other people, you will have the opportunity to substantially increase your business.

Webpage: http://www.bni.com/