A widget for 'shiny' apps to handle schedule expression input, using the 'cron-expression-input' JavaScript component. Note that this does not edit the 'crontab' file, it is just an input element for the schedules. See <https://github.com/DatalabFabriek/shinycroneditor/blob/main/inst/examples/shiny-app.R> for an example implementation.

When a 'Shiny' output (such as a plot, table, map, etc.) is recalculating, it remains 
    visible but gets greyed out. Using 'shinycssloaders', you can add a loading animation ("spinner")
    to outputs instead. By wrapping a 'Shiny' output in 'withSpinner()', a spinner will automatically
    appear while the output is recalculating. You can also manually show and hide the spinner, or add
    a full-page spinner to cover the entire page.
    See the demo online at <https://daattali.com/shiny/shinycssloaders-demo/>.

A custom css/html or gif/image file for the loading screen in R 'shiny'. It also can use the marquee to have custom text loading screen.

Create Interactive Graph (Network) Visualizations. 
  'shinyCyJS' can be used in 'Shiny' apps or viewed from 'Rstudio' Viewer.
  'shinyCyJS' includes API to build Graph model like node or edge with customized attributes for R. 
  'shinyCyJS' is built with 'cytoscape.js' and 'htmlwidgets' R package.

Create dashboards with 'Shiny'. This package provides a theme
    on top of 'Shiny', making it easy to create attractive dashboards.

Extend 'shinydashboard' with 'AdminLTE2' components. 
             'AdminLTE2' is a free 'Bootstrap 3' dashboard template available
             at <https://adminlte.io>. Customize boxes, add timelines and a lot more.

Provides three types of datetime pickers for usage in a
    'Shiny' UI. A datetime picker is an input field for selecting both a
    date and a time.

Provides a simple authentification mechanism for single 'shiny' applications.
    Authentification and password change functionality are performed calling user provided functions that typically access some database backend.
    Source code of main applications is protected until authentication is successful.