Emaze is a free presentation software that is similar to PowerPoint in the sense that it allows you to create slides and add transitions. The major difference is that Emaze has a plethora of customization features such as adding clipart anywhere on the page and add transitions similar to Prezi. You can also add 3D zoom and video backgrounds both allowing for exceptional presentations. Aside from the features of Emaze, users can share their presentations by either emailing a link or allowing you to copy and paste a link. I am unfamiliar site so I am not sure what this site all entails however there looks to be many more features available. This 2 minute video is a basic tutorial on how to use Emaze: https://www.youtube.com/watch?v=I-9nHq9ld6Q.
Website: https://www.emaze.com