What are alternatives to Shiny for UI/UX or app or deployment?

I'm actually not entirely sure what I'm looking for. I know that there have been attempts for executables, but it seems like they've been abandoned in general.

I'm used to shinyapps.io and local machine R Studio Shiny app run environment, and maybe hosting an R Studio server on some server, but unsure if these are the only options. I've seen some Shiny widgets/modules running on Rmd also.