I have created (or been involved in creating) various resources that I think may be useful for others. You can find them here.
• R Script Reference: A file of script that I use for my own reference while coding. Organized by type of task, and heavily commented.
• A Language Not a Letter: Learning Statistics in R: An online text for learning to code in R, written by graduate students at UIC and Alex Demos. I wrote Chapter 26 (Intro to Shiny).
• Low-Quality Response Detector: An R function and accompanying Shiny App that helps detect low-quality responses in survey data. Created at the request of Matt Motyl.
• Flag Suspects: An R function and accompanying Shiny App that flags survey responses from suspicious ISPs, created in concert with Itay Sisso and Max Bai.