The University of Colorado Boulder created . They have "Reactants, Products, and Leftovers" and "Balancing Chemical Equations" tools.
Unless you have an original CD and a valid unused code sitting in a drawer, searching for a "Crocodile Chemistry license code" online is a waste of time and a security risk. Crocodile Chemistry License Code
A: The original software was Windows-only. You would need WineBottler or a virtual machine (like VirtualBox running Windows XP). The University of Colorado Boulder created