Shiny is a toolkit from RStudio that makes creating web applications much easier. Installation is easy from an R console, just one line, and the latest stable version will be loaded up for you to use. There's a great tutorial that walks you through the concepts of setting up application, building one skill on top of prior lessons. Shiny is licensed GPLv3, and the source is available on GitHub.
Some of the products that appear on this site are from companies from which QuinStreet receives compensation. This compensation may impact how and where products appear on this site including, for example, the order in which they appear. QuinStreet does not include all companies or all types of products available in the marketplace.