What are some alternatives?
When comparing PathEngine and MilkShape 3D, you can also consider the following products
SelfCAD - SelfCAD is an online 3D modeling and slicing software.
EQUINOX-3D - EQUINOX-3D offers 3D modeling, animation, photorealistic rendering, photorealistic VR content creation, CAD/CAM, 3D printing, laser-cutting and more.
Wings 3D - Wings 3D is a subdivision modeler inspired by Nendo and Mirai from Izware.
Aartform Curvy 3D - Aartform Curvy 3D is an easy and fast sculpting program for Windows.
Autodesk 3DS Max - 3ds Max is software for 3D modeling, animation, rendering, and visualization. Create stunning game enrivonments, design visualizations, and virtual reality experiences.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.