LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
PTC Windchill - Windchill offers breakthrough Product Lifecycle Management (PLM) capabilities, unleashing more data to more stakeholders throughout your organization through a single source of truth for product data and processes.
FreeCAD - An open-source parametric 3D modeler
Enovia - ENOVIA offers product lifecycle management (PLM) solutions fostering innovation and operational excellence across industries.
SketchUp - 3D for Everyone
Propel - Propel is a customer-centric PLM software built on Salesforce App Cloud platform.