Color Vibrance is a free plug-in for After Effects, courtesy of Video Copilot.
Video Copilot - Sub Surface Skin Tutorial
Video Copilot have released a new tutorial focusing on sub surface skin effects in After Effects.
Element 3D - Particle Replicator Tutorial
Andrew Kramer has a new tutorial to show how to use the particle replicator in Element 3D for After Effects.
Free Photoshop Brushes
Several professional artists have made available their Photoshop brushes for free.