Kangaroo is a Live Physics engine for interactive simulation, form-finding, optimization and constraint solving.
It consists of a solver library and a set of Grasshopper components.
Installation instructions and a draft manual are included with the latest download.
For all questions and discussion please visit http://www.grasshopper3d.com/group/kangaroo
or click the 'Website' link to the right
Versions 0.096 to 0.099 make use of the Plankton halfedge mesh library by myself and and Will Pearson, released under the terms of the LGPL license ( https://github.com/meshmash/Plankton )