Interfacer - Collection of more than 200+ free design resources
Freebbble - 1000+ high-quality design freebies made by Dribbble users.
Blush - Illustrations for everyone
Freebiesbug - Collection of the best free web design resources.
MakeSumo - 3D & flat illustrations, and design tools for everyone.
Bestfolios - Portfolio website and resume collection from best designers