Some kind of map application
Building mapton requires a JDK >= 11 with bundled JavaFX modules. Azul provides their Zulu https://www.azul.com/downloads/zulu-community/ and BellSoft their Liberica https://bell-sw.com/pages/downloads/.
Both can also be installed with https://sdkman.io/.
Clone and build https://github.com/trixon/almond3, also with a FX JDK.
Clone and build https://github.com/trixon/trv-traffic-information