Small Stella is an ideal polyhedron program for schools or anyone interested in geometry. There are about 200 polyhedra provided, about 400 if you include their duals, and that's still not counting the infinite series of prisms and antiprisms. Best of...

Great Stella is the ultimate tool for creating, visualizing, and printing nets for polyhedra. It features compounds of polyhedra with their duals may be viewed, view cross-sections (or slices) through polyhedra, symmetries of any model may be displayed...

Stella4D

Stella4D 5.4

View polyhedra and 4D polytopes. Hundreds provided (Platonic, Archimedean, Kepler-Poinsot & all other uniform polyhedra, Johnson Solids, Stewart toroids, compounds, geodesics), plus all 1849 uniform 4D polytopes (the only place all these can be seen)....