Esti-Mate.com  
   Lumber estimating service, links to project calculators and other resources.
   http://www.Esti-Mate.com/

Professional Construction Estimators Association  
   Focused on professional education, with a scholarship program. Association charter, officers, and newsletters.
   http://www.pcea.org/

Cost Estimator  
   Online cost estimator for remodeling projects, with labor and materials costs for selected items. Registration required.
   http://www.costestimator.com/

R.S. Means Company  
   Construction cost software and publications, reference books, consulting services, and estimating seminars. Information on the company, on-line cost estimator, and construction dictionary.
   http://www.rsmeans.com/

Construction Estimating Institute  
   Training and development of management skills, continued education programs and improved cost estimating techniques. Course listings and schedules; online course in basic math.
   http://www.estimating.org/

Construction Costs  
   Links to selected sites providing material prices on the web.
   http://www.construction-cost.com/

EPICLine  
   Pricing information for the electrical industry. Search function, links to manufacturer catalogues.
   http://www.epicline.com/

American Society of Professional Estimators - ASPE  
   Providing estimators with education, fellowship, and opportunity for professional development. Employment board, information on the organization and its chapters.
   http://www.aspenational.com/

Design Cost Data Magazine  
   Publisher of estimating systems and historical construction cost data. Excerpts from the publication, and an on-line conceptual estimating system.
   http://www.dcd.com/

Craftsman Book Company  
   Reference books and estimating databases. Online store.
   http://www.craftsman-book.com/

F.R. Walker Company  
   Construction cost estimating reference books, forms, and tools. Company and product information.
   http://www.frankrwalker.com/