iA Presenter has transformed how I create presentations. It takes care of all the design details, ensuring pixel-perfect alignment and consistent formatting, which saves me a lot of time. This tool is now my main go-to for internal communication because I can fully concentrate on the words and keep things brief. Plus, it's super easy to tweak slides while prepping.
One thing I sometimes miss is the ability to collaborate on the same slides. I understand this would complicate the app's development, but sharing the markdown text in a shared document or Slack works well enough.