ArcGIS Notebooks has just been introduced and is now part of ArcGIS Enterprise 10.7!
Esri has released a general cumulative maintenance patch for ArcGIS GeoEvent Server 10.6.1 (Windows and Linux) --- ArcGIS GeoEvent 10.6.1 Patch 1.
The latest version – Collector for ArcGIS v19.0.1 – has just been released and is now available in the iTunes App Store.