https://github.com/brentthorne/posterdown
https://github.com/rstudio/pagedown
https://github.com/GerkeLab/betterposter
https://github.com/pzhaonet/postr
https://github.com/odeleongt/postr
https://github.com/odeleongt/flexdashboard-poster
https://github.com/bbucior/drposter
https://github.com/mathematicalcoffee/beamerposter-rmarkdown-example
Thanks. The repo seems no longer available on GitHub, but I've pointed to archived version at https://rdrr.io/github/BenBarnard/pdfposter/