NetLogo LabsLabs will be posted here each week.
You may find these demos useful for homework and may use them as substitutes to the
MATLAB programs the Mathematical Biology book suggests that use.
Excel is available in the CAL. If you would like to work from home, you can download Open Office which is a free office suite with similar functionality to MS Office.
Mathematica is available in the CAL. Student versions are on sale in the book store.