Zwcad Portable -

| Software | Type | License | |----------|------|---------| | (old versions) | 2D CAD | Free (older versions) | | nanoCAD (not truly portable) | 2D/3D | Free for basic | | LibreCAD Portable | 2D only | Open source (GPL) | | QCAD Portable | 2D only | GPL / Trial | | FreeCAD Portable | 3D parametric | Open source (LGPL) |

I understand you're looking for information on —a version of ZWCAD (a CAD software alternative to AutoCAD) designed to run from a USB drive without formal installation. Zwcad Portable