great Grasshopper component developed by MESH.
'Ortoo provides peer to peer geometry sharing. Built around a binary mesh format* that is 5x – 6x smaller than an .obj file, Ortoo is able to transfer mid-size meshes (< 35k vertices) quickly and painlessly between connected peers. The sharing/hosting app (called the Ortoo Browser) handles all the technical details of peer to peer networking via Unity’s RakNet implementation, so there is no setup required on the user side.
Currently, only geometry created with Grasshopper is supported, but future development would include support for Blender.'
Link to 'Ortoo' webpage