That said, PowerPoint isn't exactly free, and I suspect most seasoned users would agree it hasn't evolved much over the years. What if you want to integrate, say, a live Twitter feed in your presentation, or move beyond static slides?
Good news: There are plenty of PowerPoint alternatives, some of them free, some of them capable of adding considerably more pizzazz to your materials. In addition to the obvious PowerPoint clones -- Google Docs, OpenOffice Impress, Zoho Show and so on -- make sure to check out these three free outliers...
PowerPoint killers...