Hi All, here are some custom Esri Web App Builder widgets I have created. They each have their own thread, like Robert's.
I also put together a package that assembles all of these widgets and many various other Web App Builder tweaks in to one downloadable repo. It is based on a recent project, our county property viewer www.sagis.org/map
This is the entire project with all widgets and extensive customizations, all of which are documented in the Read Me.
https://github.com/kevinsagis/CustomizedWebApp_DeveloperEdition212
Note, if you increase the API Version in env.js that may fix the popup