Image Editing/Creation

[Skhilled]

Here are some free software:

The GIMP:
It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. It works on many operating systems, in many languages.
http://www.gimp.org/

Gimpshop:
uses the GIMP but its setup to look like PhotoShop
http://www.gimpshop.net/

Paint.NET:
is free image editing and photo manipulation software designed to be used on computers that run Windows. It supports layers, unlimited undo, special effects, and a wide variety of useful and powerful tools
http://www.getpaint.net/download.html#download

Blender:
is a full functional integrated 3D creation software suite. It lets users create high quality 3D graphics, movies and replay real-time, interactive 3D content. Over the last decade, Blender has evolved as an in-house tool for a leading European animation studio. Blender is powerful technology used for creating broadcast quality 3D content.
http://www.blender.org/

Inkscape:
Inkscape is an Open Source vector graphics editor, with capabilities similar to Illustrator, Freehand, CorelDraw, or Xara X using the  W3C standard Scalable Vector Graphics  (SVG) file format. Supported SVG features include shapes, paths, text, markers, clones, alpha blending, transforms, gradients, patterns, and grouping. Inkscape also supports Creative Commons meta-data, node editing, layers, complex path operations, bitmap tracing, text-on-path, flowed text, direct XML editing, and more. It imports formats such as JPEG, PNG, TIFF, and others and exports PNG as well as multiple vector-based formats.
http://www.inkscape.org/