One Feed For All Your Interests
Good article about the design and new visual identity for Codeacademy made by Pentagram
CSS Linear, Radial and Repeating Gradients
Using gradients declared in CSS. Great article explaining why.
iOS Icon Gallery
Beautiful gallery with iOS icons. Original!
Illustration concept art
Great Pinterest board with a collection of concept art for famous movies.
Getting started with pattern libraries
Excellent article in which Anna Debenham explains the work she did for the ALA pattern library.
She also gives a link to her own bookmarks for pattern libraries: Gimme Bar collection of pattern libraries
iOS 7 Colors
iOS 7 inspired colors and gradients reference site
Excellent style guide/pattern library reference Code For America.