VeloxSim Rigids allows you to do real-time simulations of rigid bodies in Rhino easily without scripts. Just select a closed mesh and create a rigid body automatically.

Super Sweep for Rhino provides various functionalities to perform sweep operations with Profiles Blocks and Rail Curves through an easy UI

Allows you to draw a rectangle with inverted fillets in the 4 angles

Simulate SU workflow in Rhino.

Tetra is an add-on for tetrahedralization and remeshing based on the fTetWild library

Convex Mesh Builder is a plugin that allows the creation of convex hull meshes in Rhino.