What are some alternatives?
When comparing Aartform Curvy 3D and SelfCAD, you can also consider the following products
PathEngine - PathEngine is a middleware toolkit for the implementation of intelligent agent movement, built around and implementation of points-of-visibility pathfinding on 3D ground surfaces.
MilkShape 3D - The MilkShape 3D website has been down for almost one week.
Strata Foto 3D CX - Strata Foto 3D CX lets user use a digital camera or any phone camera to capture real-world objects as fully textured 3D models.
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.
Autodesk Tinkercad - Tinkercad is a super easy-to-use, browser based 3D design tool.