A business partner is an individual or company who has some degree of involvement or agreement with another entity's business dealings. It is important that both sides of the agreement complement each other and have some common ground. A business partner plays a significant role in creating, owning, managing, or investing in a business/company.
These are the most active and best places to find a business partner:
Google+ Parnerup
Post your business proposal, ask the community or trade ideas.
Businesspartners.com
Sign up and find business partner. People all over the world use this site.