free and open software in my practice studio

Recently some social-media friends are asking to me about which software i use so i want to share a list of the free and open software i'm using in my little practice studio:

[] CAD

- DoubleCad XT Free - http://www.doublecad.com/
free 2d cad also for professional use (autocad LT alike ... probably better) the PRO version works in 3d mode
- A9Cad & A9Converter - http://www.a9tech.com/
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[] 3D

- Blender3d - http://www.blender.org/
- SketchUp - http://sketchup.google.com/
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[] Render Engine

- Yafaray - http://www.yafaray.org/
Global Illumination engine
- Luxrender - http://www.luxrender.net/
unbiased render engine, recently also with GPU development
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[] Graphics

- PaintNet - http://www.getpaint.net/
really handly software to adjust images
- Artweaver - http://www.artweaver.de/
photoshop alike (not like photoshop) but it works with psd files
- Inkscape - http://www.inkscape.org/
a very good alternative to Illustrator
- Scribus - http://www.scribus.net/
a very good alternative to InDesign
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[] Office

- OpenOffice - http://www.openoffice.org/
a very good alternative to Office, it works natively with doc, xls, ppt
- Q10 - http://www.baara.com/q10/
a great text editor
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[] Visual Map

- Freemind - http://freemind.sourceforge.net/wiki/index.php/Main_Page
- VUE (Visual Understanding Environment) - http://vue.tufts.edu/index.cfm
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I add some others useful free and opensource software:

- topmod3d - http://www.topmod3d.org/
TopMod3d is a free, open source, portable, platform independent topological mesh modeling system
- Syntax2d - http://sourceforge.net/projects/syntax2d/
Syntax2D is a free suite of tools for urban and architectural spatial analysis
- K3dSurf - http://k3dsurf.sourceforge.net/
K3DSurf is a program to visualize and manipulate Mathematical models
- VisIT - https://wci.llnl.gov/codes/visit/home.html
VisIt is a free interactive parallel visualization and graphical analysis tool for viewing scientific data
- SSbump Generator - http://ssbump-generator.yolasite.com/
SSbump generator is a free Self-Shadowed Bump generator
- WinTopo - http://wintopo.com/
free Raster to Vector Converter
- CamStudio - http://camstudio.org/
opensource CamStudio is able to record all screen and audio activity on your computer and create AVI files
- Kompozer - http://kompozer.net/
KompoZer is a complete web authoring system

Any suggestions and comments are welcome.
Andrea