McNeel 

RhinoCommon by: McNeel
RhinoCommon SDK for Rhino WIP for Windows
  • 42,234 total downloads
  • last updated 7/9/2019
  • Latest version: 6.16.19190.7001
  • rhino3d
RhinoCommon is the cross-platform .NET plugin SDK for Rhino
Grasshopper by: McNeel
Grasshopper SDK for Rhino WIP for Windows
  • 34,907 total downloads
  • last updated 7/9/2019
  • Latest version: 6.16.19190.7001
  • rhino3d
Grasshopper is a .NET (RhinoCommon) plugin for Rhino 5 for Windows and later.
Rhino3dmIO.Desktop by: McNeel
Rhino3dmIO toolkit for Rhino WIP for Windows
  • 25,858 total downloads
  • last updated 7/9/2019
  • Latest version: 6.16.19190.7001
  • rhino3d
Rhino3dmIO is a .NET toolkit for reading and writing 3dm files
Rhino3dmIO.iOS by: McNeel
Rhino3dmIO toolkit for Rhino WIP (iOS)
  • 22,225 total downloads
  • last updated 7/9/2019
  • Latest version: 6.16.19190.7001
  • rhino3d
Rhino3dmIO is a .NET toolkit for reading and writing 3dm files
RhinoWindows by: McNeel
  • 19,471 total downloads
  • last updated 7/9/2019
  • Latest version: 6.16.19190.7001
RhinoWindows and Eto.Wpf
Rhino3dmIO.Android by: McNeel
Rhino3dmIO toolkit for Rhino WIP (Android)
  • 15,418 total downloads
  • last updated 7/9/2019
  • Latest version: 6.16.19190.7001
  • rhino3d
Rhino3dmIO is a .NET toolkit for reading and writing 3dm files
ThreeLib by: McNeel
  • 11,633 total downloads
  • last updated 11/10/2017
  • Latest version: 1.0.208
.net Class Library for creating Three.js compatible objects.