http://www.4spe.org
Society of plastics Engineers

http://www.pantone.com/pages/pantone/colorfinder.aspx
Find a color number

http://www.ides.com
Material Specs.

http://www.plasticsnews.com
Industry news

http://www.plasticstechnology.com
Industry news

http://en.wikipedia.org/wiki/Injection_molding
Basics

http://www.immnet.com
Industry news

http://www.modplas.com
Industry news

Below is a list of links to other pages you may find useful:

Links to Industry News:

Plastics News

Plastics Technology

Other Links:
American Plastics Council

Society of Plastics Engineers

Links to Materials Data Pages:
PolyOne
GE Plastics
DuPont Plastics
Clariant colorants
Entec Polymers

Searchable Injection Molding Archive:
Injection Molding Magazine