Stan Winston School are sharing a free Photoshop character design tutorial by Dan Luvisi.
Free Photoshop Brushes
Several professional artists have made available their Photoshop brushes for free.
Art for Games - Memory Folds in Clothing Tutorial
Art for Games have posted a free tutorial on creating memory folds in cloth, using ZBrush and Photosohp.
Natural Media Toolkit for Photoshop
Nate Reeves has created the Natural Media Toolkit for Photoshop, providing versatile new tools in a compact palette.