Code Collective

http://www.code-collective.org/

Parametric Model

http://www.parametricmodel.com/

NeoArchaic

http://neoarchaic.net/category/resources/grasshopper/

Grasshopper Scripting Gallery @ McNeel

http://wiki.mcneel.com/labs/grasshoppergallery

Co-de-iT

http://www.co-de-it.com/wordpress/code/grasshopper-code

Atelier nGai

http://www.tedngai.net/category/experiments

Rhinoscript.org

http://www.rhinoscript.org/grasshopper

Giulio Piacentino

http://www.giuliopiacentino.com/grasshopper-tools/

ModeLab / Primers

http://modelab.nu/?cat=3

ModeLab / Deployment

http://modelab.nu/?cat=5

LAN code

http://www.livearchitecture.net/lan-code

The Proving Ground

http://theprovingground.wikidot.com/nathan-miller