Gimp - Platforms: Windows XP/Vista, Mac OS, Linux Distributions
Who uses it? Artist, Photographers and amateurs alike. The GIMP is an image editors that some have compared as an alternative to Photoshop then looking for an image editor. I've found myself using this program more and more because it loads so fast on my computer and has all the basic tools of Photoshop. I've used this to tone My comic Crystal Dream.
Inkscape - Windows XP/Vista, Mac OS, Linux Distributions
Who uses it? Artist, Engineers, Web designers,
Why use it? Its also free, plus its one of the most simple est vector editors out there to use. I also use this for my inking. The GUI is simple an uncluttered.
Paint net - Windows XP/Vista, Mac OS, Linux Distributions
Who uses it? Artist, Photographers and amatures alike.
Why use it? Many people find the GIMP overwhelming sometimes so they choose Paint.net as an alternative due to the fact the interface is similar to photoshop.
Who uses it? Artist
Why use it? The best thing about this program is its interface. Its very different yet quite relaxing to use. The program itself simulates natural painting. Currently it does not support watercolors but when you need a cheep to free (free does not have layer support) to Corel Painter this would be it. This is a wonderful program to open up to relax and draw. I loved it so much that I bought the full program, which is $25.00.
Art Weaver - Windows XP/Vista, Mac OS, Linux Distributions (Using Wine)
Who uses it? Artist, Photographers
Why use it? Similar to ArtRage however the interface looks more like Painter plus with the support of layers for free.
Who uses it? Artist, Engineers, and Drafters
Why use it? Compared to similar looking CAD software this is the easyest to use and requires less resources on you computer. The free version is limited comparted to the full on for about 300 UDS. However, I hear the full version is free for students. Awesome.
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