Alternatives to Microsoft Office for the Mac

I was at a school the other day where they had some lovely Mac computers but didn't use them much because they "could not write on them!" I suggested they download Neo Office which is a free alternative. I have since looked into Open Office and like it better as there is a wider range of functions which could be great for schools. The presentation tool is much better and the Draw programme is fantastic. There is also a maths programme which looks very useful. Have a look yourself here.