Making

• instructables
• Make and Craft mags
• etc.

• http://chemistry.about.com/od/crystalrecipes/a/grow-bismuth-crystals.htm

• http://lcamtuf.coredump.cx/gcnc/

• http://wiki.growstuff.org/index.php/Main_Page

Metal

• http://www.instructables.com/id/Electrolytic-Rust-Removal-aka-Magic/

Sewing

• http://en.wikipedia.org/wiki/Darning

• http://www.shapeways.com/model/699026/button-2-0.html

3D Printing

See also Graphics#3D

• http://www.shapeways.com/
• http://www.thingiverse.com/thing:8595

• http://richrap.blogspot.ca/

• http://marcuswolschon.blogspot.de/2012/09/occupy-thingiverse.html

• https://cubehero.com/

Electronics

• http://tindie.com/
• https://www.circuitlab.com/

Flying

• http://diydrones.com/

• http://makerplane.org/