leaflet-control-geocoder
Extendable geocoder with builtin support for OpenStreetMap Nominatim, Bing, Google, Mapbox, MapQuest, What3Words, Photon, Pelias, HERE, Neutrino, Plus codes
geowords
Tool for encoding geographic coordinates as sequence of words from bip39 or other dictionary
geonumber
Library for encoding geographic coordinates as single number with any number of bits