Design by Nature

• http://www.designbynaturebook.com/index.php/extras#goto9

Golden Ratio

• http://numb3rs.wolfram.com/616/
• http://www.youtube.com/watch?v=kkGeOWYOFoA
• http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibnat2.html
• http://www.goldenratiocalculator.com/
• http://www.goldennumber.net/
• http://www.phimatrix.com/

Texture, Patterns, Background

• http://www.icograda.org/resources/library.htm
• http://www.photolib.noaa.gov/art/med1.html
• http://www.dinpattern.com/
• http://www.tolweb.org/tree/
• http://www.asknature.org/
• http://www.tilingsearch.org/

Color

• http://jcsparks.com/painted/pigment-chem.html
• http://pinterest.com/colormatters/
• http://www.colormatters.com/
• http://www.colorsystem.com/?lang=en
• http://itunes.apple.com/us/app/palettes/id297157708?mt=8