I had/have a template we used for a couple of the showcase projects, but I dont really have any official 'template' for describing cool forms. Although I guess you could go checkout the few I posted a while back and see if something along those lines would make sense more generally...
https://forum.getodk.org/t/calculating-week-of-year-for-a-date
https://forum.getodk.org/t/odk-geoshape-geotrace-geopoint-to-kml
https://forum.getodk.org/t/odk-geofence-v1
https://forum.getodk.org/t/pre-populating-select-with-default-option
But I think this is perhaps something where you could probably tread new (and far better!) ground: a nice template for showcasing forms! 
As always, I'm more than happy to provide constructive criticism... 