Useful Shiny features (particularly if you're on the Open Source version). Minimal examples, still under development. Suggestions for improvement and general feedback are greatly appreciated.
User Count: Shows a count of current app sessions. Also see: https://gist.github.com/trestletech/9926129
User Auth: Allows for user authentication either through hardcoded credentials or via API. Also see: http://withr.me/authentication-of-shiny-server-application-using-a-simple-method/
User Auth with Admin: Grant people access to different parts of the app based on user permissions.