Open source projects I created, maintain or significantly contributed to.
Project
Role
★
Description
Leaflet author
45k
The number one JavaScript library for interactive maps.
Mapbox GL JS core dev
12k
JavaScript/WebGL vector maps library.
pixelmatch author
6.9k
The fastest and smallest pixel-level image comparison library.
suncalc author
3.4k
Tiny library for calculating sun/moon positions and phases.
flatbush author
1.6k
Fast static spatial index for 2D rectangles and points.
rbush author
2.8k
Fast JS R-tree-based 2D spatial index.
delaunator author
2.6k
The fastest JS Delaunay triangulation library for 2D points.
earcut author
2.5k
The fastest and smallest JS polygon triangulation library.
supercluster author
2.3k
Fast geospatial point clustering library.
geojson-vt author
2k
Very fast tile-based geospatial index for GeoJSON data.
polylabel author
1.5k
Finds the pole of inaccessibility of a polygon (for labeling).
mapbox-gl-native core dev
4.5k
OpenGL-based vector maps rendering engine (archived).
Computational geometry & geospatial algorithms
Project
Role
★
Description
kdbush author
0.7k
Very fast static spatial index for 2D points in JavaScript.
robust‑predicates author
0.3k
Fast robust geometric predicates (modern JS port of Shewchuk's).
concaveman author
0.7k
The fastest concave hull algorithm in JS.
cheap-ruler author
0.4k
Fast approximations for common geographic measurements.
tiny-sdf author
0.7k
Browser-side signed distance field generation from text.
potpack author
0.4k
A tiny and fast JS rectangle packing library (for sprite layouts).
MARTINI author
0.7k
Fast terrain meshing via right-triangulated irregular networks (RTIN).
delatin author
0.3k
Fast terrain meshing via Delaunay-based greedy triangulation.
d3-delaunay core dev
0.7k
Fast Voronoi diagram library for 2D points (based on Delaunator).
delaunator-rs author
0.3k
A port of Delaunator to Rust.
earcut.hpp core dev
1k
C++11 port of Earcut.
geoflatbush author
Geographic kNN queries for Flatbush.
geokdbush author
0.4k
Geographic kNN queries for kdbush.
rbush-knn author
kNN search plugin for RBush.
simplify-js author
2.4k
Fast JS polyline simplification library.
lineclip author
Fast library for clipping polylines and polygons by a bbox.
linematch author
Fast algorithm for comparing polyline sets (e.g. road networks).
which-polygon author
Fast index for point-in-polygon queries (e.g. point-in-country).
dobbyscan author
Fast density-based clustering of geographic points.
icomesh author
Fast icosphere mesh generation library for WebGL visualizations.
Project
Role
★
Description
pbf maintainer
0.9k
Low-level, lightweight protocol buffers encoder/decoder for JS.
webgl-wind author
1.1k
WebGL-powered wind particle visualization.
simpleheat author
1k
Tiny JavaScript library for drawing heatmaps with Canvas.
Leaflet.heat author
1.6k
Simple, fast heatmap plugin for Leaflet.
flamebearer author
1.7k
Blazing fast flame graphs for Node & V8.
bullshit.js author
1.9k
Bookmarklet to expose bullshit on web pages.
road-orientation-map author
0.3k
A visualization of road orientations on an interactive map.
claudefiles author
Tiny Claude Code efficiency kit (status line & guard hook).
tinyjam author
A radically simple, zero-configuration static site generator.
yeahjs author
A tiny, fast, modern EJS templating library.
geobuf maintainer
1k
Compact binary encoding for geospatial data.
vector-tile-js maintainer
0.4k
Library for parsing Mapbox vector tiles in JavaScript.
tinyqueue author
0.5k
Small and simple JS priority queue.
flatqueue author
A faster but more limited variation of tinyqueue.
quickselect author
Fast selection algorithm in JavaScript (Floyd-Rivest).
simple-statistics core dev
3.5k
Descriptive, regression, and inference statistics for JS.
Older, deprecated, unfinished or experimental projects — kept as a record of past work.
Project
Role
Description
magic-string core dev
Tool for generating source maps (earlier contributions).
kothic-js core dev
Full-featured JS map rendering engine using HTML5 Canvas (earlier contributions).
dead-simple-grid author
250-byte CSS grid framework (unmaintained).
tile-cover core dev
Generates the minimum set of tiles that cover a geometry (unmaintained).
tile-reduce core dev
Scalable vector tile geospatial analysis library for Node (unmaintained).
geojson-vt-cpp core dev
C++11 port of GeoJSON-VT (archived).
seidel author
Seidel's polygon triangulation in JS (deprecated).
binary-split maintainer
Fast Node.js stream splitter.
geojson-cpp author
C++14 library for converting GeoJSON into geometry.hpp representation (archived; formerly geojson.hpp).
mbtiles-extracts author
Tool for extracting regional subsets of MBTiles files (archived).
bbtrees author
Self-balancing binary search tree implementations in JS (unfinished).
supercluster.hpp author
C++14 port of Supercluster (archived).
tile-decorator author
JS tool for optimizing vector tiles (unmaintained).
github-org-browser author
Simple tool for browsing public repos of a GitHub organization.
kdbush.hpp author
C++11 port of KDBush (archived).
cumulative-timer author
Simple cumulative timer for benchmarking JavaScript (archived).
Leaflet.TouchHover author
Leaflet plugin for hover interactions on mobile.
polysnap author
Snap rounding a polygon with self-intersections (a work in progress).
suncalc-go author
Go port of SunCalc (unfinished).
polyclip author
Martinez polygon boolean operations in JS (unfinished).
pbf-split author
Splits a Node stream of length-prefixed protocol buffer messages (deprecated).
fanny author
Experiments with feedforward neural networks in JS.
rollup-plugin-unassert maintainer
A Rollup plugin to remove assertion calls via Unassert.
hain author
Port of Hain's polygon trapezoidation in JS (unfinished).