Want to try your hand at 3D modeling? Here are some more great, FREE programs you can download and use.
Tinkercad is great for beginners- you slide geometric shapes onto a 3D workplane. You can group shapes and even create holes.
Sculptris is a program where you can digitally sculpt using a variety of carving tools. Your design will be symmetrical but there is a lot of possibility.
Blender is designed for the true 3D modeling enthusiast. Completely free, you have access to digital sculpting tools along with animation capabilities.
1-2-3D Catch is a great way to freely laser scan objects (or yourself) by using your smartphone or tablet computer.