the answer is No.
Microsoft only produced the PP viewer for System 9 and System 9 under OS X (Classic)
Apple's Keynote, part of the iWork suite, can handle PP presentations as can Microsoft Office for Mac.
Both of the above are not free. iWork is $79 (could be less) and MS Office starts at $130 for the Student/Teacher edition and goes upwards from there.
Open Office is FREE. It will open PP presentations and has a good price. You can see it Here
Is there free software to view PPS, (Windows Powerpoint) available for my PowerBook G4 with OS X? If so, where do I go to download it?