ngageoint/geopackage-js

Slice GeoJSON into vector tiles on the fly in the browser

Renderer for 3D Tiles in Javascript using three.js, Babylon.js, and r3f

geotiff.js is a small library to parse TIFF files for visualization or analysis. It is written in pure JavaScript, and is usable in both the browser and node.js applications.

compact, modular JavaScript wrappers for the ArcGIS REST API

GeoArrow in Rust, Python, and JavaScript (WebAssembly) with vectorized geometry operations

A modular geospatial engine written in JavaScript and TypeScript

h3-js provides a JavaScript version of H3, a hexagon-based geospatial indexing system.

whitebox_next_gen geospatial tools (plus new GeoLibre tools) compiled to WebAssembly (WASI) for in-browser use in GeoLibre

MapLibre GL JS - Interactive vector tile maps in the browser