Autodesk 123D Design

MobiBrix QR Generator

REUSABLE QR CODE

Unlike other sites, MobiBrix offers you the ability to generate your free QR code that you can reuse numerous times. If you want your QR code to lead back to your brand's Facebook page today and then your YouTube Channel next week, you have the power to change the URL without physically altering the appearance of the QR code. This all means an infinite amount of options for you, less money spent on print and simplicity in your marketing.

http://mobibrix.com/

If you register your .edu email address with Autodesk, you can download any of their software for free and use it while you are a student @ Columbia.
I would recommend starting with Mudbox, which is a sculpting program that allows you to paint textures on your model when you're done creating it.

Register here - https://students.autodesk.com/?nd=register_v2

Turbo Squid
http://www.turbosquid.com/

Autodesk 3D creation apps

123D Catch

123D Sculpt