Roxel vs Sproxel

Roxel is a free, open-source desktop voxel editor for hobbyists and indie creators, available for Windows and macOS. Its tools include brush, erase, recolor, eyedrop, select, move, and shape drawing. Rectangles, ellipses, and lines can be drawn on a build plane or extruded into 3D forms. An open-world grid allows painting across X/Z and upward as far as memory permits. Roxel includes built-in palettes, user palette management, and Adobe Swatch Exchange import and export. It opens MagicaVoxel .vox, Qubicle .qb, and Goxel .gox files, and exports .vox, .gox, .obj, .fbx, .glb, .png, and .svg. Projects use the .rox format; the maker says .glb exports are ready for Unity and Godot. Light, Dark, and System themes include customizable canvas and floor colors. The MIT license permits use, forks, and building on the project. Its itch.io page marks it in development and lists version 0.7.1 downloads. The maker says macOS builds are self-signed and not notarized, and Windows builds are unsigned.

Sproxel is a free, open-source 3D interface for making and editing voxel models, using cube-based forms as an extension of 2D pixel art. It can generate sprites for custom displays or game engines. Version 0.4 supports importing BMP, GIF, JPEG, PNG and TIFF images into voxel grids, and exporting OBJ meshes as quads or triangles without internal polygons. Version 0.5 added grid resizing, draggable tools with previews, voxel outlines, camera snapping and a two-click Line tool. Version 0.6 added multi-sprite projects, a Python plug-in system, Paint3D (.3MP) import and export, slicing, and indexed-color grids with a 256-color palette. The maker describes it as developed on Windows and Linux using the QT windowing framework; the listed platforms are Windows, macOS and Linux. The download is described as a package that can be copied to a directory and run without installation. The package has no help file, and the maker points users to a manual. The version 0.6 release post said its download was win32 only at that time.