I lead (🌟) and/or contribute to (👯) the following open-source projects and documents, some of which are forks (🍴):

• 🌟Cosuite for better meetings and teaching:
  • 🌟Comingle provides multiroom meetings with persistent apps/state within rooms
    • 🌟Comingle Attendance measures attendance in Comingle meetings
  • 🌟Cocreate provides collaborative whiteboards
  • 🌟Coauthor provides collaborative note-taking / forum
• Demos I use for teaching discrete mathematics and algorithms:
  • 👯PokeTree: Animated demos of Binary Search Trees (BSTs) and AVL trees with Pokémon
  • 🌟Modular Demos illustrate modular arithmetic
  • 🌟Sliding Squares Puzzle implements the classic n² − 1 puzzle in Solid and Civet, with sliding animations

• Origami
  • 👯FOLD is a file format for origami designs/meshes, and JavaScript code to manipulate them
  • 👯Origami Simulator simulates paper folding
  • 🌟Crease Pattern Editor
• Mathematical demos
  • 👯Tiling with Three Polygons is Undecidable: Implementation of a paper converting Wang tiles into three polygons with equivalent tilings
  • 👯PokeTree: Animated demos of Binary Search Trees (BSTs) and AVL trees with Pokémon
  • 🌟Modular Demos illustrate modular arithmetic
• Mathematics
  • 👯Every Author as First Author: source code for a humorous paper about stacking names on top of each other
  • 👯TOPP: The Open Problems Project lists open problems in computational geometry
  • 🌟Short Chess searches for mates on short chess boards
• Utilities
  • 🌟mathcestor renders academic ancestor trees from Mathematics Genealogy Project, such as mine
  • 🌟beancount counts how many papers and coauthors each author has according to DBLP

• Art
  • 🌟Algorithmic Character Layout generates random perspective arrangements of images, as used by our Hanging Out sculpture
  • 🌟QR Designer generates perfect QR codes with detailed background images, and shows how to build them from stacked laser-cut sheets of material, as used by our 3D QR prints
  • 👯Virtual Glass simulates glass blowing, especially cane
  • 🌟Word Ladder Designer lets you explore sequences like CAT → COT → DOT → DOG
• 🌟Mathematical and puzzle fonts
  • 🌟Ada, Coin Sliding, Cube Folding, Impossible Folding, Integer Sequence, Juggling, Orthogonal Fold & Cut, Path Puzzles, Spiral Galaxies, Strip Folding, Sudoku, Tatamibari, Tetris, Voronoi, Yin-Yang
  • 🌟font-webapp is a small frontend framework (built on furls) for building these apps
  • 🌟furls is a small frontend framework for synchronizing form state with the page URL

• 🍴As-Toroids is higher-genus Asteroids
• 🌟Attractor implements magnetic puzzles/counterexamples from a paper
• 👯Bust-a-Move / Puzzle Bobble clone with hardness gadgets
• 🌟Sliding Squares Puzzle implements the classic n² − 1 puzzle in Solid and Civet, with sliding animations
  • ...replacing 🍴8 puzzle which is a small fork of a 15-puzzle implementation
• 🍴2048 without merging illustrates a 2048 variation studied in a paper
• 🌟recursed-xls2lua makes it easier to design custom Recursed levels

• Talks/slides using a combination of RevealJS, Pug/Stylus, SVG Tiler, etc.
  • 👯Every Author as First Author
  • 🌟Puzzle Fonts About Puzzles
  • 🌟Token Swapping and Robot Pivoting
  • 👯Yin-Yang Puzzles are NP-complete
  • 🌟Token Swapping on Trees
  • 🌟reveal-pug-talk is the template for this powerful combination of slide creation technology, and is the basis for the above talks
• 🌟Timer counts down remaining time for live presentations
• 🌟pptxgrep searches for text on slides in PowerPoint files

• LaTeX
  • 👯Texlish: Better LaTeX that compiles to LaTeX
  • 🌟Templates: My usual starting point and with GitHub Action to build to PDF
  • 👯KaTeX renders LaTeX to HTML [maintainer]
  • 🌟tex2svg-webworker renders LaTeX to SVG in a Web Worker (used by Cocreate)
  • 🌟tex2text converts simple LaTeX to ASCII or Markdown
  • 🌟alpha-key is a BibTeX style for overriding alphabetic labels
• Markdown
  • 🌟markdown-it-replacements customizes replacements in markdown-it typographer
  • 🌟markdownlint-rule-github-internal-links checks GitHub-style internal links in Markdown
• Figure drawing tools
  • 🌟SVG Tiler combines SVG tiles according to ASCII art or a spreadsheet
  • 🌟svgink converts SVG to PDF/PNG via Inkscape
  • 🌟Computational Geometry Playground lets you interactively write code that computes and renders geometric objects
• 🌟shtml2html statically renders Apache's server-parsed HTML

• 👯Civet is a new programming language that merges modern ECMAScript/TypeScript with CoffeeScript and lots of additional language features and syntactic sugar, transpiling to ECMAScript or TypeScript
  • 👯Hera is the parser generator that Civet is based on
  • Projects here written in Civet: Algorithmic Character Layout, beancount, civet-solid-vite-template, client-side-tanstack-ai-demo, mathcestor, Modular Demos, PokeTree, QR Designer, shtml2html, Sliding Squares Puzzle, Tiling with Three Polygons is Undecidable, Word Ladder Designer
• 👯CoffeeScript
  • 🌟CoffeeScript for Python programmers: a guide
  • 🌟python2coffee attempts to convert Python → CoffeeScript automatically
  • 🌟WIP branch with TypeScript support (effort moved to Civet)
• Babel
  • 🌟babel-plugin-module-deps tracks which CJS modules require/import which others for dependency tracking (used by SVG Tiler)

• 👯SolidJS is a front-end JavaScript framework [docs and ecosystem teams]
  • 🌟civet-solid-vite-template is a template for SolidJS apps using Civet and Vite
  • Meteor integration
    • 🌟meteor-solid supports the SolidJS compiler in Meteor
    • 🌟solid-meteor-data provides primitives for combining Solid and Meteor reactivity
    • 🌟solid-meteor-demo is a simple example illustrating the above
    • 🌟meteor-solid-template-helper enables use of Solid components inside Meteor Blaze templates
  • 👯solid-bootstrap: Bootstrap 5 components
• Meteor is a full-stack JavaScript framework
  • 🌟edemaine:civet adds Civet language support
    • 🌟meteor-civet-test-react is a minimal example app
  • 🍴edemaine:file-collection stores uploaded files in MongoDB GridFS (used by Coauthor)
  • 🍴edemaine:sharejs is an aging integration with CodeMirror 5 and ShareJS (used by Coauthor)
  • 🌟edemaine:static-pug renders static Pug content
  • 🍴@edemaine/meteor-tracker is an NPM version of meteor/tracker and meteor/reactive-var for testing simple Meteor code without Meteor (used by solid-meteor-data)
  • 🌟kadira-compose runs open-source Kadira via Docker Compose
• 🌟preact-render-to-dom converts Preact VDOM to DOM or xmldom or jsdom without reactivity, faster than stringifying and parsing (used by SVG Tiler)
• 🍴codemirror-spell-checker adds basic English spell checking to CodeMirror 4
• 🌟client-side-tanstack-ai-demo demonstrates text and image generation via TanStack AI with bring-your-own-key OpenRouter, fully client-side

• Discord/Slack
  • 🍴slack-backup exports Slack data (including private channels) for Discord import
• Web scripts
  • 🌟dark-monkey adds dark(er) modes to some websites
  • 🌟github-issue.js minimalizes a GitHub issue for printing as a referee response
  • 🌟when2meet-subset.js enables toggling subset of users in when2meet results view
• Hardware
  • 🌟USB-UIRT CLI lets you send and learn IR codes with USB-UIRT hardware
• Babies
  • Nara Gaiden summarizes your multiple babies tracked by the Nara Baby app