I'm running OS X 10.6.8. The App Store won't sell me Keynote, insisting I need at least OS X 10.7.4. I don't see any other need to upgrade the OS, don't care to spend the money, and don't have time to upgrade right now anyway.

Is there any way to get Keynote for my OS?

If not, any suggestions for other presentation software I could use? I'd rather avoid PowerPoint.