Procreate on iPad
Procreate is a raster graphics editor app for digital painting developed and published by the Australian company Savage Interactive for Apple’s iOS and iPadOS.
Blender
Blender is a free and open-source 3D computer graphics software tool set used for creating animated films, visual effects, art, 3D-printed models, motion graphics, interactive 3D applications, virtual reality, and, formerly, video games.
MagicaVoxel for voxel art
Voxel art, also called 3D pixel art, is a type of art form where 3D models are constructed entirely out of 3D pixels called voxels. Artists are able to create these voxel models using a special type of software called a voxel editor.
MagicalVoxel is a free lightweight GPU-based voxel art editor and interactive path tracing renderer.