FreeCAD - An open-source parametric 3D modeler
SolidWorks Composer - Easily repurpose existing 3D models to rapidly create and update high-quality graphical assets that are fully associated with your 3D design.
SketchUp - 3D for Everyone
Autodesk Fusion 360 - Integrated CAD, CAM, and CAE featuring collaborative editing and cloud-based computation.
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
Inventor - Inventor is a 3D CAD software that lets you quickly create 3D models with embedded intelligence, intuitive workflows, and optimized performance.