X3D! It can also import Minecraft Models, voxelize OBJ/DXF/WRL, optimize Voxels from Binvox format, extrude PNG files and create voxels from Heighmap. Cubik PRO is easy to use and can export 3D Models for Minecraft (for Blocks, Items, Mods and Schematics) as well as common 3D formats like.
It allows everyone to design 3D Models composed of textured Cubes and Planes.