Banker
American Bankers Association (ABA)
RMA - The Risk Management Association
California
Find Law
CalTrans
California Contractors State License Board
California Secretary of State - Business Search
Construction
American Concrete Pavement Association (ACPA)
American Institute of Constructors (AIC)
American Institute of Steel Construction (AISC)
American Road and Transportation Builders Association (ARTBA)
American Society of Professional Estimators (ASPE)
American Subcontractors Association (ASA)
Associated Builders and Contractors (ABC)
Associated General Contractors of America (AGC)
Associated Specialty Contractors (ASC)
Construction Financial Management Association of America (CFMA)
Construction Management Association of America (CMAA)
Construction Writers Association (CWA)
Design-Build Institute of America (DBIA)
Mechanical Contractors Association of America (MCAA)
National Asphalt Pavement Association (NAPA)
National Association of Home Builders (NAHB)
National Association of Minority Contractors (NAMC)
National Association of Women in Construction (NAWIC)
National Utility Contractors Association (NUCA)
Professional Women in Construction (PWC)
The Road Information Program (TRIP)
Design Professional
American Council of Engineering Companies (ACEC)
American Institute of Architects (AIA)
American Planning Association (APA)
American Society of Civil Engineers (ASCE)
American Society of Mechanical Engineers (ASME)
Construction Specifications Institute (CSI)
National Society of Professional Engineers (NSPE)
Government
American Association of State Highway & Transportation Officials (AASHTO)
Council of State Community Development Agencies (COSCDA)
Council of State Governments
National Association of Counties (NACo)
Public Risk Management Association (PRIMA)
Small Business Administration (SBA) Office of Surety Guarantees
State Insurance Department Web Sites - from the National Association of Insurance Commissioners (NAIC)
US Census Bureau Construction Statistics
US General Services Administration (GSA) - Public Buildings
US Treasury Department Circular 570 ("T" List)
International
International Credit Insurance & Surety Association (ICISA)
Panamerican Surety Association (PASA)
Surety Association of Canada (SAC)
Owner/Developer
Associated Owners & Developers (AOD)
Building Owners & Managers Association (BOMA)
Construction Owners Association of America (COAA)
Risk & Insurance Management Society, Inc. (RIMS)
Rating
A.M. Best Company
Dun & Bradstreet
Fitch Ratings
Moody's Investors Service
Standard & Poor's
Weiss Ratings, Inc.
Surety/Insurance Organizations
ACORD Global Insurance Standard
American Agent & Broker 
American Institute for CPCU
American Insurance Association (AIA)
The Carolinas Surety Association (CSA)
Council of Insurance Agents and Brokers (CIAB)
Florida Surety Association
Independent Insurance Agents of America (IIAA)
Insurance Information Institute (III)
International Risk Management Institute (IRMI)
Minnesota Surety Association
National Association of Insurance Commissioners (NAIC)
National Association of Surety Bond Producers (NASBP)
Reinsurance Association of America (RAA)
The Surety Association of America (SAA)
Surety Association of Georgia
Surety Association of Illinois
Surety Association of Indianapolis
Surety Association of Kansas City
Surety Association of Nevada
Surety Association of New Jersey
Surety Association of Ohio
Surety Association of San Diego
Surety Association of St. Louis
Surety Association of Washington
Texas Surety Federation