Spec-Net Building Index Construction, engineering, and interior design industry portal. http://www.buildingindex.com

Habitat Directory International search for construction industry manufacturers, associations and suppliers. http://www.habitatsearch.com

International Design and Construction Online Source of information and e-commerce for the construction and design industries worldwide. http://www.e-idc.com

Window Cleaning Center A worldwide directory of window cleaning companies. http://www.window-cleaning-center.com

BuilderWeb Worldwide directory of housing industry product and service providers. Includes a forum. http://www.builderweb.com/

MasterPlumbers Portal for plumbing news and business and service listings worldwide. http://www.masterplumbers.com/

Log World.com Log home builders worldwide directory of manufacturers, suppliers, log home maintenance and information for log home owners. http://www.log-world.com

Virtual Architect Portal for the construction industry, which lists links to product and software suppliers, consultants and technical information. http://www.virtual-architect.net/

The Concrete Connection Worldwide directory of concrete product and service providers. Includes a forum. http://www.concreteconnection.com

International Directory of Construction Law Directory devoted to lawyers in the construction industry. http://www.constructionlawdirectory.com/

Structural Preservation Systems, Inc. Provides services, systems and technologies that build, repair, protect, strengthen and reinforce concrete, steel, masonry, timber and soils. http://www.spsrepair.com