Virtual Plastic

http://www.virtualplastic.net/
From the site:
..surgery for Windows. Collected tweaks & links to change the look.
Like skinning apps, except this time it is your operating system

PHP Freaks

http://www.phpfreaks.com/forums/
PHP forums – ask all of your PHP questions here!

CG Society

http://www.cgsociety.org/
From the site:
The CGSociety is the most respected and accessible global organization for creative digital artists. The CGS supports artists at every level by offering a range of services to connect, inform, educate and promote, by celebrating achievement, excellence and innovation in all aspects of digital art.
This place has a ton of graphics tutorials. For [...]

Blender Artists

http://blenderartists.org/cms/index.php
Forum, tutorials, and community site for Blender 3D and animation artists.

3D Links

http://www.3dlinks.com/
Massive array of 3D tutorials, galleries, plugins, objects, etc.

POVRAY

http://www.povray.org/
From the site:
The Persistence of Vision Raytracer is a high-quality, totally free tool for creating stunning three-dimensional graphics. It is available in official versions for Windows, Mac OS/Mac OS X and i86 Linux. The source code is available for those wanting to do their own ports.

Blender

http://www.blender.org/
Free open source 3D content creation software.

GIMP Guru

http://gimpguru.org/Tutorials/
Many useful photo enhancement tutorials. Although originally written for version 1.x, the gist is the same for the 2.x updates.