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.
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.
The design of this page was partly adapted from Research: By Course, Subject, or Topic, by University of Arizona Libraries, © 2020 The Arizona Board of Regents on behalf of The University of Arizona, licensed under a Creative Commons Attribution 4.0 International License.