The official U.S. Government Link where you can find compliance information, contacts to multiple government sites and forms.
The National Business Association where you can get information on your likelihood of obtaining an SBA guaranteed loan.
The U.S. Census Bureau where you can find population, housing, economic and geographic data.
SBA Online counseling and training for entrepreneurs and startups.
SCORE Free counseling and business plan preparation
Legal advice, forms, contracts and other legal stuff