Canva is a site for all types of designs. You can make posters, graphics, infographics, and presentations. They have many free templates you can use.
Prezi is a tool for creating presentations that are not linear. It has templates, or you can create your own.
Haiku Deck is a slide program that keeps it simple. It's special in that it searches the Internet for high-quality images that photographers have licensed under Creative Commons, and automatically pulls in the proper attribution. There's even an iPad app!
You have to set up a free account, but you can also set up your privacy preferences so only classmates can see your presentation.
