StorylineJS

StorylineJS looks great - a simple way to create an annotated and interactive chart (just point to your data in Google Sheets).

Kilauea: Fountains of Fire

Kilauea: Fountains of Fire is a pretty neat Esri Story Map and the creator explains the process of making here at The Making of Kilauea: Fountains of Fire. Here's a pretty cool animated GIF:

https://blogs.esri.com/esri/arcgis/2017/09/13/the-making-of-kilauea-fountains-of-fire/

Rising Seas

Here we have a web map with the actual sea level measurement station data: Rising Seas. This shows the actual measured values, not predicted ones say for the 21st century.

Sparklines as Fonts

This looks really interesting: a font that creates sparklines called AtF Spark.

Landsat Viewer

New from Esri: Landsat Viewer. This looks promising and useful.

Irma and the Islands

Pretty impressive images of the Caribbean Islands before and after Irma:

https://earthobservatory.nasa.gov/IOTD/view.php?id=90952&src=iotdrss

Finally: a clear and calm Irma forecast!