Some websites devoted to creativity:

Creative Center of the Universe
http://gocreate.com/index.htm 
Contains material concerning development of new ideas through writing, idea generation, creative thinking, innovation, problem solving in organizations, industry, and education.

CreativityPool.com
http://www.creativitypool.com/ 
Database full of creative and original ideas.

Directed Creativity
http://www.directedcreativity.com 
Directed creativity is the purposeful production of creative ideas in a topic area, followed up by deliberate effort to implement some of those ideas. Developed by Paul Plsek includes a tool kit to direct creativity and consulting and seminar services.

American Creativity Association
http://www.amcreativityassoc.org 
ACA offers a global network of creative professionals in disciplines ranging from business and industry to education and the arts. ACA's collective expertise provides a wide range of problem-solving methods, from simple idea-capture techniques to complex problem-solving methodologies.

Creativity & Innovation Portal
http://www.creax.com/ 
Free portal devoted to creative and innovation matters. Includes lots of interesting links on the subject. Stands out the “Trends portal,” “Natural innovation” and “Creativity test” sections.