Dust3D is described as 'cross-platform open-source modeling software. It helps you create a 3D watertight model in seconds. Use it to speed up your character modeling in game making, 3D printing, and so on' and is a 3D Modeler in the Photos & Graphics category. There are four alternatives to Dust3D for a variety of platforms, including Windows, Linux, Mac, PortableApps.com and Steam. The best alternative is Blender, which is both free and Open Source. Other great apps like Dust3D are OpenSCAD (Free, Open Source), MagicaCSG (Free) and picoCAD (Free).
picoCAD is a program to build and texture lowpoly 3D models. Programs for modelling are overly complicated, picoCAD aims to make it fun, easy, and accessible by focusing on the bare essentials. This program was made using pico 8.