One of the neatest things to come along in a long while has been Presenter Coach, an AI app inside of PowerPoint. It tries to give you helpful feedback on your presenting skills based on your own PowerPoint and the words, phrasing and elocution you use. First... make your PowerPoint. You can make it in Desktop PowerPoint, iPad PowerPoint, Mac PowerPoint or Online PowerPoint (or whatever version of PowerPoint you have!) but to access Presenter Coach, you need to use PowerPoint Online (which is free and tied in to your Office365 or Hotmail/Outlook accounts). Store your PowerPoint in your OneDrive -- this is the important part -- and then visit http://office.com and click on PowerPoint. You're now in PowerPoint Online! It gives you the opportunity to make a new PowerPoint and shows you all the PowerPoints you have been working on recently (including those shared with you). Click on the one you want to practice and it will open in a new browser window. You...
...not something ready-made, but something in continuous formation through choice of action. J. Dewey