GNU/Emacs Org-mode For Presentation Slides/HTML Slides (Emacs org-reveal)
A short video on using GNU/EMACS for presentations using org reveal and reveal.js library
GNU/Emacs :
https://www.gnu.org/software/emacs/
Org-reveal :
https://github.com/yjwen/org-reveal
Reveal.JS :
https://revealjs.com/