The City of Raleigh uses Esri Leaflet to help citizens quickly find nearby electric vehicle charging stations, green roofs, and solar trash compactors.
The U.S. Census measures and shares national statistic data about every single household in the United States. To make the information accessible to application developers they developed CitySDK which uses the Terraformer library to convert between Esri JSON and GeoJSON.
Gibbs Seed Company constantly monitors current agricultural conditions and appropriate seed hybrids for farmers to plant throughout their fields. Using Spark-Geo and PySAL they can analyze over 300 million planting options in under 10 minutes.
The Smithsonian maintains vast archives of cultural heritage. They use Story Maps to provide the rich history and spatial context of our world.
Indoor routing for iOS devices built in Xamarin with the ArcGIS Runtime SDK for .NET. With some customization, you can change the app to use your indoor data and locators.