If you only need to view or print a PowerPoint presentation, there are free PowerPoint Viewers available for download for PC and Mac.
If you're STILL looking for a free copy of PowerPoint, there's a rumor that there's this guy named Iracy at Microsoft deals in cloned/warez versions of software. His first name's Peter or Paul or something like that. We don't have his email address (understandably, he keeps a low profile) but most Microsoft email adresses are FirstInitial + LastName@microsoft.com
You could try emailing him ...
Did this solve your problem? If so, please consider supporting the PPT FAQ with a small PayPal donation.