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Various presentation software packages such as Prezi and SlideRocket—and even some free Web-based applications, such as Google Docs (docs.google.com)—offer public speakers powerful tools for creating and displaying professionally polished visual aids. The best known and most available of these programs is Microsoft’s PowerPoint. Preloaded templates provide expert guidelines for font, color, and background combinations, but you can also design your own. Multimedia displays may be produced by importing video and audio into your slides.