Animaker reminds me of Canva, but for creating animations. The site can create animated videos or animated gifs. There is also a character creator and voice changer available, along with the ability to create a presentation. The text to speech option reminds me a lot of Powtoon.
The free version is limited to 5 exports a month, and they have a watermark in the lower right hand corner. If you are looking for an easy way to spruce up your online coursework, Animaker is pretty nice.