Sample datacards, shapefiles, and other files you can use for testing

React Flow | Svelte Flow - Powerful open source libraries for building node-based UIs with React (https://reactflow.dev) or Svelte (https://svelteflow.dev). Ready out-of-the-box and infinitely cust…

Pure JavaScript mbtiles parser. Based on sqlite.c compiled by emscripten.

Convert geographic coords to and from geomagnetic coords

A web app for simulating a waving flag.

Schema to Yup validation

Gray-Level Co-Occurrence Matrix image analyzer with WebGL.

A library to compute the Minimum Bounding Rectangle of a GeoJSON polygon

Draw an image with SVG

Interactive, thoroughly customizable maps in the browser, powered by vector tiles and WebGL

Super Low-Level Raster Reprojection and Resampling Library

Searchable Dropdown

React-Native library for detecting beacons (iOS and Android)

React-Native library for detecting beacons (iOS and Android)

Matrix manipulation and computation library

Icon font generation tool

Drag-and-drop sortable component for nested data and hierarchies

ESP8266 core for Arduino

Use react-annotation with built-in annotation types, or extend it to make custom annotations. It is made for annotations in SVG.

Use d3-annotation with built-in annotation types, or extend it to make custom annotations. It is made for d3-v4 in SVG.

A tiny JavaScript library for calculating sun/moon positions and phases.

Draw tools for mapbox-gl-js

Format MIDI Sysex Messages

Audio waveform player

Tame the Web MIDI API. Send and receive MIDI messages with ease. Control instruments with user-friendly functions (playNote, sendPitchBend, etc.). React to MIDI input with simple event listeners (n…

The Select Component for React.js

Allow a Cypress chain to resolve to a promise