Poll your audience in real time by downloading a slide from the Poll Everywhere site and inserting it into your PowerPoint file. Audience members can respond to questions by text or Twitter from their phones. Results appear in a customizable graph or running list of tweets. COST: Free for audiences of up to 30, then 10 cents to 30 cents per person

Inc. Magazine says we make PowerPoints yawn-proof. True story. In under a minute you can create a poll and download it as a PowerPoint slide, all without signing up for an account.