Table of contents
You can design nice apps using Dojo & calcite
arcgis-server-store: A module that implements the dojo/store API for ArcGIS Server REST services.
geometry engine A Deep Dive on How the Geometry Engine Can Help You
Yeoman - Generator for ArcGIS JS API applications https://github.com/odoe/generator-arcgis-js-app
People you should know
Please find the ArcGIS Experts (story tellers and developers) on this topic here: https://esri-es.github.io/arcgis-experts/?topic=Dojo
They don't work on the support team and some may even not work at Esri, but they are opening some projects and sharing insights related to this technology so we recommend you to follow them.