Emaze is tool that works somewhat similar to Prezi; however, you work from a slide to slide standpoint much like PowerPoint instead of working from one large canvas.
Emaze has 3 dimensional transitions that lets you create stunning visual presentations.
You can even upload already-made PowerPoints and convert them to Emazing presentations! (you may have to modify a bit)
Powtoon
With Powtoon, you can create slides with awesome transitions, images, and characters that in the end will play as an animated video!
Choose from a number of themes or start from scratch
Simple drag and drop
Add music and voice narration
Utilize the slider at the bottom to adjust the timing of your image transitions
When finished, upload to YouTube or Vimeo, download as a PDF, share to social media, or email it
Powtoon offers plenty of tutorials to learn the ins and outs to creating your own presentation.
Once you and your students have learned this tool they will be well on their way to wowing their audience!