MagicaCSG is described as 'A lightweight signed distance field editor and renderer' and is an app in the Photos & Graphics category. There are more than 100 alternatives to MagicaCSG for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and iPad. The best alternative is Blender, which is both free and Open Source. Other great apps like MagicaCSG are Natron (Free, Open Source), Wings 3D (Free, Open Source), Autodesk Maya (Paid) and ZBrush (Paid).
Wings 3D is a subdivision modeler inspired by Nendo and Mirai from Izware. It is possible to assign materials, vertex color, UV coordinates and textures, but there will be improvements in those features before Wings goes 1.0.
Armory is an open-source 3D game engine with full Blender integration, turning it into a complete game development tool. The result is a unified workflow from start to finish, making you work faster. No more jumping between different applications.