Enables instrumentation of 'Shiny' apps for tracking user
    session events such as input changes, browser type, and session
    duration.  These events can be sent to any of the available storage
    backends and analyzed using the included 'Shiny' app to gain insights
    about app usage and adoption.

It allows you to delegate heavy computation tasks
    to a separate process, such that it does not freeze your Shiny app.

Ace editor bindings to enable a rich text editing environment
    within Shiny.

Make R data available in Web-based virtual reality experiences
  for immersive, cross-platform data visualizations. Includes the 'gg-aframe'
  JavaScript package for a Grammar of Graphics declarative HTML syntax to create
  3-dimensional data visualizations with 'Mozilla A-Frame' <https://aframe.io>.

Easily create pretty popup messages (modals) in 'Shiny'. A modal can
    contain text, images, OK/Cancel buttons, an input to get a response from the
    user, and many more customizable options.

An extension of 'animate.css' that allows user to easily add animations to any UI element in 'shiny' app using the elements id.

Add in-app user authentication to 'shiny', 
    allowing you to secure publicly hosted apps and 
    build dynamic user interfaces from user information.

A graphical user interface (GUI) for fitting Bayesian regression
    models using the package 'brms' which in turn relies on 'Stan'
    (<https://mc-stan.org/>). The 'shinybrms' GUI is a 'shiny' app.

Sometimes it's useful to know some information about your user in a 'Shiny' app. The available
    information is: browser name (such as 'Chrome' or 'Safari') and version, device type 
    (mobile or desktop), operating system (such as 'Windows' or 'Mac' or 'Android') and version,
    and browser dimensions.

Adds additional Twitter Bootstrap components to Shiny.

Add indicators (spinner, progress bar, gif) in your 'shiny'
  applications to show the user that the server is busy. And other tools to let
  your users know something is happening (send notifications, reports, ...).