Preparing a presentation in LaTeX? Metropolis provides a simple, modern Beamer theme suitable for anyone to use.
Metropolis is available on CTAN and comes bundled with the latest TeX Live distribution.
I was a major contributor to Metropolis from 2015 to 2016. If you want to help make the theme better, you can join the development efforts on Matthias Vogelgesang’s GitHub page for the project.