ReMake is a 3d modeling and design program, but unlike others it is designed for manipulating 3d models which have already been created. It can adjust and re-size models, stretch or skew specific aspects of models, or even incorporate multiple models into a single object for 3d printing.
AutoDesk ReMake offers a free license to all Tulane students and employees, anyone with a valid "@tulane.edu" email address can download and install it for free on their personal computer.
Install Link: http://www.autodesk.com/education/free-software/remake
There are a number of different user tutorials provided at https://remake.autodesk.com/resources