Official
Geocoder
Includes a search box control you can add to your map, as well as low level tools for making geocoding requests.
Renderers
Ensure that symbology defined by ArcGIS Server and ArcGIS Online for feature layers is inherited in Leaflet.
Clustered Feature Layer
Visualize feature layers using clustering with the help of Leaflet.markercluster.
Community
Stream Feature Layer
A plugin for displaying Stream layers published to ArcGIS Server using GeoEvent.
Dynamic Map Layer
A more advanced DynamicMapLayer implementation that includes support for continuous panning across the dateline.
Leaflet Routing Machine
Leaflet plugin that enables walk, drive and truck routing using Esri's hosted service.