Photoshop
COLOUR
PHLEARN - How to Use the Histogram
DRAWING
Drawing with Jazza - Drawing Fundementals: Composition
TIPS
Julian Tsependa Color - Blending Tip
FlippedNormals - Top 10 Photoshop Tips
SHORTCUTS
PHLEARN - Keyboard Shortcuts (Diagram)
PLUGINS
Exr-IO - OpenEXR image reader and writer
SCRIPTS
Will Fuller - Step Backward Smart Script