Free Voxel Builder Alternatives
Voxel Builder is described as 'lets you easily create and edit 3D voxel graphics right in your browser. Simply select a colored block and click to draw'. There are more than 10 alternatives to Voxel Builder for various platforms. The best alternative is MagicaVoxel, which is free. Other great apps like Voxel Builder are Goxel (Free, Open Source), VoxelShop (Free, Open Source), Project Vox (Free) and Curious Blocks (Free).