FreeCAD - An open-source parametric 3D modeler
PackMojo - Create custom packaging in 3D and order in low volume
SketchUp - 3D for Everyone
PakBoxes - PakBoxes offers pioneer packaging solutions for your brand. We offer custom boxes packaging at wholesale to meet your budget. Order beautiful custom printed boxes for all your products now.
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
Repack - Reusable and returnable packaging service for e-commerce