Oldie but goodie: the first #Shiny #Rstats App I ever built: https://tladeras.shinyapps.io/surrogateShiny/

It helps biologists explore network based clusters of genomic alterations (mutations/copy number).

It uses some outdated packages such as {ggvis} for tooltips, but still runs on shinyapps.io.

Just don't ask me to redploy it.