d3-polygon3.0.0Operations for two-dimensional polygons.
gojs2.2.18Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
leaflet.freedraw2.0.1Zoopla inspired freehand polygon creation using Leaflet.js.
leaflet.pm2.2.0A Leaflet Plugin For Editing Geometry Layers in Leaflet 1.0
Turf.js6.5.0a node.js library for performing geospatial operations with geojson
polylabel1.1.0A JS library for finding optimal label position inside a polygon
polyavatar0.8.0Simple plugin to generate polygonal avatars with customization options.