Esri plugins
Clustered Feature Layer
Visualize feature layers using clustering with the help of Leaflet.markercluster.
Geocoder
Includes a search box control you can add to your map, as well as low level tools for making geocoding requests.
Heatmap Feature Layer
Visualize feature layers with heatmaps via Leaflet.heat.
Renderers
Ensure that symbology defined by ArcGIS Server and ArcGIS Online for feature layers is inherited in Leaflet.
shapeMarkers
Generic, fixed size, shape marker symbols for points in Leaflet.
Vector Tiles
Visualize vector tiles from ArcGIS Online