• StoryBird
  https://storybird.com/
• Cos
  https://www.storylinecreator.com/
• Storyboard That
  https://www.storyboardthat.com/
• UTellStory
  http://utellstory.com/
• Storybooks Canada
  https://storybookscanada.ca/
• Visme
  https://www.visme.co (infographics, presentations)
  It’s free for five projects per month, and you receive 100 MB of storage and the ability to download .jpgs and publish online.
• Bublr (still pictures)
  https://www.pimpampum.net/en/content/bubblr
• ACMI (moving pictures)
  https://www.acmi.net.au/education/online-learning/film-it
• WeVideo (collaborative video editing)
  https://www.wevideo.com/

more storytelling tools in this IMS blog:
http://blog.stcloudstate.edu/ims?s=digital+storytelling+tools

For Digital Storytelling, consider this SCSU course:
https://web.stcloudstate.edu/pmiltenoff/lib490/