Apps similar to FlatFab include Pepakura Designer. It's paid, but DXF2papercraft and Lamina3d are free. Other options are Unfold3D. In total there are four 3D Modelers like FlatFab for Windows, Linux, Mac, the web and self-hosting.
Pepakura Designer allows you to easily create papercraft models from 3D data you create from your favorite 3D software. The save and export functions are disabled before registering. Otherwise all functions work without limitation in the shareware version.
Japan
DXF2papercraft converts a polygonal 3D model stored as DXF file into a plain drawing in the form of a 2D DXF file. This requires to 'unfold' the model. The result is a flattened pattern of connected polygons.
Germany
EU
UNFOLD3D is today the preferred unwrapping tool used by major studios producing games and animation, but also by many independent artists. Polygonal Design, creator of UNFOLD3D technology, is recognized by many artists as the most efficient unfolding tool in the world.
Free, open source replacement for Autodesk's discontinued Slicer for Fusion 360 and 123D Make: turn a 3D model into flat parts for laser, CNC and plasma cutting.
