Many thanks to a Scripps Institution of Oceanography colleague who posted this information. Details are at: http://students.autodesk.com/
Brief details are: Autodesk makes its software available for free, with a 3 year renewable license, to educational users. There are a few downsides, the worst being all printouts have an “Educational Version” banner around the edges. The verification of your educational status is that you have a .edu mail address. Some of the programs are available in both Windows and native Apple. The Windows only programs are tweaked to run on Apples with Parallels Desktop.
Hope this is helpful!