It depends on what you are presenting. I found [mdp](https://github.com/visit1985/mdp) to be very useful when presenting a tech talk. It is easy to copy and paste from the source material, it can be done all via the terminal, and it views well as a README on github.
I’ve had good success with mdp as well - when I saw the OP I was kind of hoping it would work with the same format mdp uses so I could go either lo-fi or fancy depending on the audience.
Here is an example of a presentation I gave:
https://github.com/veganjay/prefectdemo/blob/main/presentati...