Autodesk Inventor Professional 2014

to download go to:

Sign up by going to "create account"
After registering, sign in and scroll down until you see Autodesk Inventor Professional (about half way down the page, in the third column)
click on "Inventor Professional" and then fill out the information in #2
2. choose "Inventor Professional 2014" as your version
then select English as the language
next select whether your computer is a 32-bit or 64-bit windows operating system
Finally click install now

Links that definitely help: (tutorial on how to operate the stress simulator) (in intro into sheet metal; you don't have to change the default k-factor or the material for now... you can for practice sake) (shows how to use some constraints) (shows how to use even more constraints)