CCIM Net - searchable listing service (MLS) for CCIM members

CoStar - #1 commercial real estate information company in the U.S. and U.K.

Loopnet - searchable listing service (MLS)

CCIM Institute - official site

Bloomberg.com - information related to the general state of the economy and areas affecting the real estate market

Integra Realty Services - real estate market conditions and projections

U.S. Department of Housing and Urban Development - official site

National Apartment Association - official site

Real Estate Research Corporation - real estate research, publications, market studies, property valuations, investment criteria, and trends analysis

U.S. Census Bureau - complete census information

U.S. Department of Labor - Bureau of Labor Statistics