"MoI (Moment of Inspiration) is a new 3D modeling/CAD program for designers and artists.
Offering a blend of precision and freeform drawing tools, it sports a unique user interface that operates seamlessly with a pen tablet (a mouse is also supported).
MoI is currently in open beta release. If you're looking for a fresh, fluid way to draw and create CAD-accurate 3D models, then download the beta and give it a try! Also, please drop by the discussion forum to give any feedback.