Learn Linux, 101: File and directory management

Photo Compositing with The GIMP

Packt Publishing has a two part series of tutorials on Photo Compositing with The GIMP. It was written by Reynante Martinez.
Links Here:

Photo Compositing with The GIMP: Part 1

Photo Compositing with The GIMP: Part 2

Open-Source Compositing in Blender

Linux Journal article from 2007 : How to use node-based compositing in Blender.

CGTUTS+ Create Incredible Looking Hair Effects with Particles in Blender

CGTUTS+ has a great video tutorial on Creating Hair Effects using Blender’s Particles. This is day one of the series.

Creating Depth of Field with Blender

Blender guru has posted a great tutorial on creating depth of field using blender.

Change the color of a car using GIMP