Tactile Graphics Resources
Guidelines
http://www.tactilegraphics.org/ - BANA guidelines
http://www.aph.org/edresearch/guides.htm
http://www.nctd.org.uk/WhatareTGs.asp#useful
Free image editing software
http://getpaint.net/ 
Viewplus Tiger embossers:
http://www.viewplus.com/ - product information
http://downloads.viewplus.com/examples/2/ - sample graphics (geography, math, maps)
Swellform:
http://www.americanthermoform.com/swell.htm - product information
http://www.tactilelibrary.com/ - sample graphics (various types)
http://www.labcomputers.net/Products-P.I.A.F.htm - product information
http://www.brailler.com/repro.htm - product information
http://www.piaf-tactile.com/tactile-graphics-resources.html - PIAF examples and information, and a design manual
Braille embossers:
http://www.duxburysystems.com/products.asp - software information
Thermoform:
http://www.americanthermoform.com/ezform.htm - product information
http://www.americanthermoform.com/maxiform.htm - product information

Enabling Technologies Phoenix
http://www.brailler.com/phoenix.htm - product information

Touch Graphics STEM binder
http://touchgraphics.com/OnlineStore/index.php/ttp-accessories.html - product information
General tactile graphics:
http://imagelibrary.aph.org/main.jsp - American Printing House for the Blind - sample graphics
http://www.touchgraphics.com/ - Touch Graphics - product information
http://www.cal-s.org/ - Creative Adaptations for Learning - educational tactile graphics produced
http://www.nbp.org/ - National Braille Press - pre-made tactile graphics, other tactile materials