International:

Coroflot
http://www.coroflot.com
Coroflot is a design portfolio and design jobs site built to facilitate connections between individuals and companies within the creative industries. You can make a connection of your own by adding your design portfolio, posting a design job opening or listing your design organization.

Design Firms
http://www.designfirms.org
Directory of Web Designers, Web Developers, Logo Designers, Graphic Designers and more all in one location.

Dexigner
http://www.dexigner.com/directory/
Design Directory is a comprehensive international design links database and search engine.

Design Addict
http://www.designaddict.com/
DesignAddict links directory has a large collection of resources useful to the design community.

Design Engine
http://www.design-engine.com/
Design Engine a resource site for designers with news, features, directory, etc.

Designers Network
http://www.designers-network.com/
Designers includes designers directory, forum and news.

Design Schools
http://www.designschools.com/
Has listing of design schools worldwide

Tribu Design
http://www.tribu-design.com/
Tribu Design has a database of more than 900 designers and manufacturers