algorithmic modeling for Rhino
This video showcases the capabilities of FlexHopper to simulate soft bodies, namely different deformable shell strip geometries, making use of the shape matching constraint paradigm.
FlexHopper (a C# plugin for Grasshopper) is built upon FlexCLI (a purpose built C++/CLI interface). FlexCLI is built upon NVidia Flex. Once it's in a deployable state it'll be all free to use.