Links

Texture sites
amazingtextures.com
http://www.textureking.com/
http://www.materia.nl/531.0.html
http://www.mayang.com/textures/
http://www.cgtextures.com/
http://mediamilitia.com/category/freebies/
http://www.bricksntiles.com/textures/
IOR list, etc
http://www.m3corp.com/a/tutorials/refraction.htm
http://theodoregray.com/PeriodicTable/indexS.rgb.html#tabletop
http://physics.info/refraction/
http://hypertextbook.com/facts/2005/refraction.shtml
hdri sites
http://www.hdrmill.com/Freebies.htm
http://www.hdrlabs.com/sibl/archive.html
DOF and Camera sites
http://camerasim.com/camera-simulator.html
http://think.maxwellrender.com/dof_cue_tool-111.html
Product Photography: How To Market Products With Photos [19 Pro Tips]
Lighting
http://www.warpedspace.org/lightingT/part1.htm
http://www.zumtobel.com
Gem stone models
http://www.3dlapidary.com/HTML/Stones2.htm
Nasa models
http://www.nasa.gov/multimedia/3d_resources/models.html
Honda models
http://www.honda.co.jp/hondafan/WebPlamo/
Hermanmiller models ( seating etc)
Hermanmiller.com
colour matching sites
http://www.colourlovers.com/blog/2007/06/20/color-inspiration-from-the-masters-of-painting/
http://www.colorblender.com/
Fonts
http://cooltext.com/Fonts-Futuristic
UV texture sheets (grids)
http://www.pixelcg.com/blog/?p=146
Logos
http://www.brandsoftheworld.com/
http://logotypes.designer.am/