3D Tools for Other Low-Spec

Blender is the free 3D suite, and it turns up constantly in low-spec work: modelling and texturing low-poly assets, rendering 3D scenes down to a pixel-art sprite sheet, and building the turnarounds that hand-pixelled animation is traced from. Its add-on ecosystem covers most of the rest.

Crocotile 3D places pixel art tiles in 3D space to build low-poly scenes and models, exporting to common formats.

SpriteStack is a voxel editor that renders its models as pixel art sprite stacks and rotations, for games that fake 3D with sprites.