FlatFab Alternatives
FlatFab is described as 'flatfab marries digital modeling and traditional craftsmanship. 3D printing in new-age materials is great for small complex objects, but prohibitive in time and money for anything bigger than your fist' and is an app. There are four alternatives to FlatFab for Windows, Mac, iPad, iPhone and Linux. The best alternative is Unfold3D. It's not free, so if you're looking for a free alternative, you could try 123D Make or DXF2papercraft.
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.
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.
Software to transform 3d models for laser cutting, origami, folding, cardboard & plywood.
Discontinued
it has been discontinued
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.
Discontinued
The program seems to be no longer updated. Last version, 0.2, released in February 2012, can be still downloaded from SourceForge.