LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
NttCAD - Free 2D/3D CAD software, easy to use and multi-platform
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.
TYCAD - TYCAD is a application for computer aided drafting (CAD) in two dimensions (2D).
Autodesk Maya - Maya is 3D computer animation software with powerful modeling, rendering, simulation, texturing, and animation tools for artists, modelers, and animators.