WeaverBird

http://www.giuliopiacentino.com/weaverbird/

Kangaroo

http://spacesymmetrystructure.wordpress.com/

http://www.grasshopper3d.com/group/kangaroo?xg_source=activity

Rabbit

http://morphocode.com/rabbit/

Geco + Mesh analysis

http://utos.blogspot.com/

FireFly

http://www.grasshopper3d.com/profile/firefly

http://www.fireflyexperiments.com/download/

gHowl

http://www.grasshopper3d.com/group/ghowl

Mantis

http://www.grasshopper3d.com/group/mantis?xg_source=activity

StructDrawRhino

http://ssi.wikidot.com/

T-Splines

http://www.tsplines.com/forum/viewtopic.php?f=9&t=29673

LazyCutter

http://www.atelierbinturong.com/2011/02/lazycutter-all-wrapped-up.html

Karamba

http://twl.uni-ak.ac.at/karamba/

Minimal Surface Plugin

http://www.grasshopper3d.com/profiles/blogs/minimal-surface-plugin

food4rhino

http://www.food4rhino.com/latest-grasshopper-addons

ModeLab / Tools

http://modelab.nu/?cat=513

Add-ons @ grasshopper3d.com

http://www.grasshopper3d.com/page/addons-for-grasshopper