Food4Rhino

Dynamic 3D Sectioning and 2D Layouts for Rhino

Helps create sections that update with model changes.  Sections can create outline curves, solids and hatches. It also create updatable 2D layout of sections.  There are many utility function to move sections, load sections locations from external file, view sectioned models (clipping) and generate 2D outlines of sectioned 3D models.

Integration in Rhino 8 (Windows and Mac):
https://discourse.mcneel.com/t/rhino-8-feature-sectiontools-integrated/162094

Installing SectionTools for Rhino 7 for Windows: 
Use the PackageManager command in Rhino, to search for "SectionTools" and click “Download and Install”.