GIMP is an excellent open source alternative to Photoshop. This is a link to a long list of tutorials, which are fully community-written.
More resources from FoP Staff
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Heads Up Rudy Winston: Learn To See LightRudy Winston about a photographer's most important tool: light -
Tutorial Slimming Poses for Curvy BridesSlimming pose techniques for plus size brides -
Manuals Canon Advanced User GuidesLinks to Canon Guides -
Tools Depth of Field CalculatorHandy DOF calculator -
Manuals Sony ManualsSony camera manuals