3D Pixel Artist is described as 'app that helps you design voxel arts. It's very intuitive and easy to use. Your designs can be 3D printed too! It supports exporting to STL & OBJ models' and is an app in the Photos & Graphics category. There are more than 10 alternatives to 3D Pixel Artist for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and Steam. The best alternative is 3D-Coat. It's not free, so if you're looking for a free alternative, you could try MagicaVoxel or Goxel. Other great apps like 3D Pixel Artist are Marmoset Hexels 3 (Paid), VoxelShop (Free, Open Source), Voxel Builder (Free, Open Source) and Cubik Studio (Paid).
With VoxEdit, it is easy to draw and view amazing 3D pixel art images. VoxEdit comes with it's own built-in image editor and 3D viewing window. These will allow you to edit and view your 3D images live, in the same program.
With VoxelMaker you can create 3D models of your own design and then render them with realistic lighting and shadows. Voxel models are made from 3D cubes and create a stylized, "blocky" look - much like a 3D version of pixel art.
Pixel Studio follows the key strong points from all the of the Pixarra artist software products but with a focus on pixel art. Useful as utility for creating icons, sprites, and other small images for games and websites but also for art on its own.