Mike Bostock

Crossfilter. I built a tool that filters millions of records in your browser instantly.

Delaunator. I built a fast JavaScript tool that triangulates scattered points.

Cubism. I built a tool that visualizes live data streams as interactive charts.

Notebook Kit. I made a tool that turns Observable Notebooks into websites.

TopoJSON. I built a format that makes map files smaller by sharing geography.

US Atlas. I packaged U.S. Census maps into files ready to visualize.

ArraySource. I made a way to read arrays as standard data streams.

Relative Time. I made a tool that displays dates in everyday language across all languages.

Queue. I made a tiny tool that runs background tasks with controlled speed.

Topoedit. I built a visual editor for geographic map data files.

US Rivers. I made a detailed map of every U.S. river and stream.

Flood Fill. I made a tool that fills connected areas with random colors.

Shapefile. I built a tool that reads geographic map data files in JavaScript.

Stack. I made a presentation tool where scrolling replaces slide clicks.

Gistup. I built a tool that uploads files to GitHub snippets and lets you update them with git.

Solar Calculator. I built a tool that calculates the sun's position for any date and place.

Node Envy. I made a tool that runs browser code on servers.

Crom Test Bar. I wrote a test tool for checking software package dependencies.

Mongo-Mock. I made an in-memory fake MongoDB for unit testing.

ASCII. I built a tool that converts special characters in JavaScript code to simple text.

Isoformat. I built a date formatter that makes dates shorter and more readable.

Path Data. I built a tool that cleans up and standardizes SVG shape instructions.

JSON to Module. I built a tool that converts JSON files into reusable code modules.

File Source. I built a way to read files in chunks using standard web stream patterns.

Cube Logplex. I built a tool that shows Heroku app logs as a live dashboard.

NNS. I wrote a tool for building interactive charts on websites.

Topotree. I built a tool that finds relationships between shapes on maps.

Stream Source. I wrote a tool that reads Node streams using browser-standard stream methods.

RW. I fixed how Node reads and writes piped data so it actually works.

CStree. I built a format for storing tree data as comma-separated text.

RW. I built a simpler tool for reading and writing files.

world-atlas. Pre-built TopoJSON from Natural Earth.

Mappy. I made a tool that draws maps on servers without opening a browser.

Hide Flickr Eyebrow. I made a Chrome extension that removes Flickr's annoying interface elements.

Polly-B-Gone. I made a 3D physics puzzle game where a robot escapes a laboratory.

Hexbin. I made a tool that groups scattered data points into hexagonal patterns.

Crom Test. I made a test tool for checking if code dependencies work together.

ndjson-cli. I made command-line tools for processing JSON data streams.

Just ASCII. I wrote a tool that converts special characters in JavaScript to plain ASCII.

Rollup Test Case. I created a test case that reproduces a Rollup bundling issue.

Svjimmy. I made a bookmarklet that saves SVG images as PNG files.

Framework Help. I gathered examples and answers for Observable Framework questions.

Path Source. I built a tool that reads files and web pages as standard streams.

Sankey. I made a tool that draws flow diagrams showing how things move between places.

InternMap. I built a smarter Map that treats equivalent values as the same key.

Git Static. I made a file server that pulls directly from your Git history.

Mike Bostock. I made a redirect to my portfolio website.

ColorBrewer Theme. I made color themes for Sublime Text based on proven color science.

Preamble. I built a tool that generates copyright headers from project metadata.

Twitch Chat Relay. I built a service that lets apps listen to Twitch chat messages.