Pepakura Designer - Pepakura Designer allows you to easily create papercraft models from 3D data you create from your...
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
Ultimate Papercraft 3D - Ultimate Papercraft 3D is a standalone software for creating papercraft from 3D models.
Altium Designer - PCB Design Software
Ultimate Unwrap 3D - Ultimate Unwrap 3D is a standalone UV mapping software for unfolding and unwrapping 3D models.
LibrePCB - LibrePCB is a free EDA software to develop printed circuit boards.