signSearch
Database for locating sign manufacturers, installers, and products in the United States and Canada.
http://www.signsearch.com/

SignWeb
News, how-to articles, and product information for sign makers and buyers.
http://www.signweb.com/

Sign Makers.com
Place to find sign makers and signshops worldwide.
http://www.sign-makers.com

SignCraft Magazine
Information about the print magazine offering articles on techniques, materials, pricing, sales, layout, and computer-aided sign making.
http://www.signcraft.com/

Fastsigns
Shows worldwide locations of Fastsigns franchises, which offer signs, graphics, full color digital imaging, exhibits, and displays.
http://www.fastsigns.com/

Sign Makers Resources
Sign making resources on the internet
http://www.colebrothers.com/signprice/links.html

Sign College
Information for signmaking professionals.
http://www.signwarehouse.com/sign_college/

SignTrade - Signmakers' Resource Centre
Global sign trade resource centre for sign makers, digital printing, display and graphic industries. Directory of vendors, product reviews, tutorials, services and useful know-how articles.
http://www.signtrade.org/

Yahoo! Directory
Signs and Signage. Includes all sign type categories.
http://dir.yahoo.com/Business_and_Economy/Business_to_Business/Signage/

United Application Standards Group
United States organization of professional graphic and decal installers.
http://www.uasg.org

Digital Dynamic Signage Resource Directory
Digital signage resource directory that lists companies involved in the creation, sales, supply, and service of digital dynamic signage networks. Based in Poulsbo, WA.
http://www.digitalsignagedirectory.com/

WebLinks Digital Signs Directory
Site offers a selection of digital signage listings including content developers, hardware providers, and software solutions.
http://www.activeweblinks.com/digital-signs/directory/

Sign Business
Monthly publication featuring the business, artistry, and technology of making signs. Includes news, classifieds and buyer's guide.
http://www.nbm.com/sb/

SignCompaniesOnline
Database resource of information on sign companies that can make, install or service signs in the U.S.
http://www.signcompaniesonline.com/