d3-array
Array manipulation, ordering, searching, summarizing, etc.
natural
General natural language (tokenizing, stemming (English, Russian, Spanish), part-of-speech tagging, sentiment analysis, classification, inflection, phonetics, tfidf, WordNet, jaro-winkler, Levenshtein distance, Dice's Coefficient) facilities for node.
@turf/turf
a JavaScript library for performing geospatial operations with GeoJSON