Software
An Open Source vector graphics editor, with capabilities similar to Illustrator, CorelDraw, or Xara X, using the W3C standard Scalable Vector Graphics (SVG) file format.
Inkscape supports many advanced SVG features (markers, clones, alpha blending, etc.) and great care is taken in designing a streamlined interface. It is very easy to edit nodes, perform complex path operations, trace bitmaps and much more. We also aim to maintain a thriving user and developer community by using open, community-oriented development. (source: inkscape.org)
Click here to get Inkscape for Windows..... FREE!
Blender is the free open source 3D content creation suite, available for all major operating systems under the GNU General Public License. With blender, you can create anything that you can imagine, in 3D! (source: blender.org)
Click here to get blender..... FREE!
The Gimp The "GNU Image Manipulation Program" (originally the General Image Manipulation Program) sired by Spencer Kimball & Peter Mattis.
In their own words, "GIMP is our answer to the current lack of free (or at least reasonably priced) image manipulation software for GNU/Linux and UNIX in general."
It is a raster editor, which means that it performs operations directly on the pixels that make up the image, and not a vector editor. Other (proprietary) raster editors include Adobe Photoshop, Jasc Paintshop Pro and the humble Microsoft Paint. An alternative free editor is the KOffice project, Krita. Users wanting to edit photographs will certainly want a raster editor like GIMP. Graphic designers and illustrators may prefer a vector editor depending on their tastes. (source: gimp.org)
Click here to get the Gimp..... FREE!
Paint.NET is free image and photo editing software for computers that run Windows. It features an intuitive and innovative user interface with support for layers, unlimited undo, special effects, and a wide variety of useful and powerful tools.
Click here to get Paint.net..... FREE!
Notepad++ is a free (as in "free speech" and also as in "free beer") source code editor and Notepad replacement that supports several languages. Running in the MS Windows environment, its use is governed by GPL Licence.
Based on a powerful editing component Scintilla, Notepad++ is written in C++ and uses pure Win32 API and STL which ensures a higher execution speed and smaller program size. By optimizing as many routines as possible without losing user friendlyness, Notepad++ is trying to reduce the world carbon dioxide emissions. When using less CPU power, the PC can throttle down and reduce power consumption, resulting in a greener environment.
Click here to get Notepad ++..... FREE!