Graphic+Arts+and+3-D+Rendering

DrawIsland []
allows you to draw and create animated GIF files

ArtRage Starter Edition
[] An incredibly realistic artists paint program featuring multiple mediums and tremendous adaptability. And it's FUN! Layers are disabled in the Starter Edition, but there is an alpha channel...so import into Photoshop or GIMP is easy. Biggest surprise, the full version is ridiculously low priced for what this program can do.

Paint.net http://www.getpaint.net/
A simple raster image editor for Windows with a large array of user-made plugins.

Inkscape [|http://inkscape.org/]
Open source SVG (vector) graphics editor

Google SketchUp (create, modify, and share 3-D models)
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Sculptris (3-D modeling/sculpting)
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Blender (3-D animation)
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Clker
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Vecteezy
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WPClipArt
http://www.wpclipart.com/ (good instructions on how to use clip art from the web in Google Docs without downloading via urls) []