JustSketchMe - Interactive 3d models for drawing reference
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
InstaPart - Build circuit boards faster with parts delivered in <24 hrs
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.
FineToon.net - Create caricatures of you and your friends
Autodesk Maya - Maya is 3D computer animation software with powerful modeling, rendering, simulation, texturing, and animation tools for artists, modelers, and animators.