Pixel Studio is described as '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' and is an app in the Photos & Graphics category. There are nine alternatives to Pixel Studio for a variety of platforms, including Windows, Linux, Online / Web-based, Mac and Android. The best alternative is MagicaVoxel, which is free. Other great apps like Pixel Studio are TwistedBrush Pro Studio (Paid), VoxelShop (Free, Open Source), Voxel Builder (Free, Open Source) and imEditor (Free, Open Source).
Voxel Builder lets you easily create and edit 3D voxel graphics right in your browser. Simply select a colored block and click to draw. Zoom in and out with the mouse and click and drag to navigate around the 3D canvas.
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.