#interactive

CowBull – Bulls and Cows word game

A free, multiplayer word game implementation of Bulls and Cows (like Wordle). Solo mode, shared game links, no accounts needed.

Any Human Ever — Random historical life generator

Interactive tool that draws random historical lives by combining randomized birth years (weighted by population exponential growth), geographic locations, and generated life narratives. Uses AI image generation (FLUX.1). Claims real historical sourcing. Appeared on HN frontpage 3x, suggesting quality/novelty interest.

NationalDex — Pokédex Reference Tool

Minimal open-source web-based Pokédex covering all 1025 Pokémon across every generation. Features generation-specific stats, type matchups, learnsets, abilities, evolution data, and integration with Pokémon TCG cards. Allows browsing by type, building teams, and comparing Pokémon across game generations.

Movie Scene Map — Filming Locations Database

Interactive map database of 15,716+ real filming locations across 166 countries for films, TV series, video games, anime, and manga. Users can search by title or location to discover where productions were shot or set.

Revo Programming Language

Documentation and community site for Revo, an indie dynamic programming language designed for the joy of programming. Features browser-based IDE, community Discord, and handcrafted design with personality.

asciiQuake

Play Quake rendered as live ASCII characters using GlyphCSS — a novel approach to classic game rendering without WebGL or canvas. A creative technical experiment showcasing an unconventional rendering technique.

Laser Graffiti

Point a projector and webcam at a wall, draw with a laser pointer, and the projector paints your strokes in real-time. Open-source browser-based tool with features like wet ink drips, 3D spinning, kaleidoscope mirroring, and sparkle trails. Works without hardware via mouse/touch demo.

GlassBox — browser fingerprint visualization

Interactive browser fingerprinting tool that visualizes every signal websites can extract to identify you. Runs entirely client-side, privacy-conscious design, serves a niche educational/security purpose.

SkyLens — Live 3D Satellite Tracker + Declassified UAP Archive

Interactive 3D real-time satellite tracker combined with a curated archive of 375+ declassified government UAP case files, NASA asteroid tracking, and space news. Free, no signup required, RSS feed available.

Shoehorn — Quantize LLMs to your hardware

Interactive browser-based tool for quantizing large language models to fit your personal machine. Scans Hugging Face's most-downloaded models, estimates which ones fit your specific hardware (Mac, GPU, custom configs), visualizes memory budgets, then provides a local CLI app and web interface to run the chosen model via llama.cpp. Combines practical utility with a clean, hands-on approach to a niche problem.

os8088: Mac-like GUI for IBM XT in real-mode assembly

A hobby project reimagining the early Macintosh desktop for 1980s IBM PC hardware. Written entirely in real-mode 8086 assembly, boots from floppy in 256KB, features overlapping windows, pull-down menus, preemptive multitasking, and can run multiple programs simultaneously. Open source (MIT), runnable in browser via emulator, with excellent documentation and a finished 1.0 release.

Eigendrum

Draw a shape and hear it as a real drum. Uses finite element analysis to simulate actual vibration modes—every frequency comes from your outline, not a sample.

Eigendrum - draw a shape and hear it as a drum

Interactive tool combining finite element simulation, physics, and audio synthesis. Draw any shape and hear it as a real drum with physically accurate vibration modes and overtones.

Every Cube

Interactive web tool for exploring all 43 quintillion possible Rubik's Cube states. Users can scroll through and view famous permutations like Superflip and Checkerboard with move notations.

Stowaway

Real-time 3D visualization of aircraft and satellites overhead, with physically-based rendering of your local sky, terrain, and celestial bodies. Pick any aircraft or satellite and ride along as it flies across real terrain.

Tectonic Globe

An interactive web visualization that rotates Earth's continents and cities through deep geological time (1 billion years past to 250 million years future) using scientific plate reconstruction models. A beautifully executed, single-creator project blending data, science, and interactive exploration.

Decker — Interactive Document Platform

A multimedia platform for creating and sharing interactive documents inspired by HyperCard, featuring a retro 1-bit ditherpunk aesthetic. Create e-zines, games, presentations, pixel art, and interactive experiences in the browser or on desktop (Mac/Windows/Linux). Includes a novel scripting language (Lil) and outputs as standalone shareable HTML.

Ancient Library

Interactive reader for 1,060 Greek and Latin classical texts with full parsing — click any word to see lemma, morphology, and dictionary entries (Lewis & Short for Latin, LSJ for Greek). Beautifully organized by genre across 140 authors.

The Listening Museum

Interactive curatorial experience of 36 mechanical keyboards and their sounds, from vintage IBM Model M (1985) to modern Topre and thocky customs. Click keyboards to explore anatomy and history, type on your own keyboard to hear each sound simulated in real-time. Thoughtfully curated from open-source community recordings with explicit methodology acknowledging limitations.

What Colors Are We? Constructing A Color Space For Skin Tones

Interactive color picker and procedural generation tool for creating diverse, inclusive skin tones. Built as a custom color space with JavaScript-based picker and Python algorithm to help digital artists and game developers represent human diversity authentically.

Dark Hours

Real-time astronomy observation planner showing sky brightness, weather conditions, constellation visibility, and best viewing windows for your location. Personalized, thoughtfully designed indie tool with error-bar transparency in light pollution modeling.

ssh.place: Collaborative Drawing Canvas Over SSH

A shared pixel canvas accessible via SSH with no account or installation required. Users draw with arrow keys/hjkl, select colors 0-9, and wait 15-second cooldowns like Reddit's r/place. Cooldowns are keyed to SSH identity, not IP. A delightfully minimal, community-driven creative tool.

Extinct Media Museum Tokyo

A private museum in Tokyo with 4,000+ items documenting the evolution and obsolescence of media technologies—from 8mm film cameras to VHS and early digital devices. Hands-on 'touch museum' where visitors interact with the collection. Substantial curatorial effort, active publication (RSS feed), and repeated HN frontpage mentions signal authentic community interest.

RecipeTables

A handcrafted web tool that converts recipes into an innovative prep-table format (ingredients as rows, steps as merged columns), making recipes readable at a glance. Built by Juan Buis with daily improvements. Supports URL/text/image upload, library browsing, scaling, exporting, and sharing.

HaxxorWPM

Terminal command typing speed test for developers. Measures WPM, accuracy, and command count in timed 30/60/120-second challenges. Minimalist indie web tool with real-time feedback.

MSAP-2 Simulator

Interactive web-based simulator for a custom 8-bit discrete logic computer. A handcrafted educational tool exploring retrocomputing and digital circuit design through an explorable, interactive interface.

clipart.studio — magazine collage maker

A delightful digital collage tool. Pick magazines from the Internet Archive, clip pieces you want, arrange them on the page, download or submit to the public gallery. Thoughtfully designed interface with keyboard shortcuts, undo/redo, and playful aesthetics.

Atlas - Interactive Research Paper Map

Interactive visualization mapping 8.5M+ research papers from arXiv by field and sub-cluster. Pick a domain, see where research is most active, and explore paper relationships and connections across fields.

Neil the Seal - 3D Browser Game

A free 3D browser game where you play as an elephant seal causing mischief in suburban Tasmania. Indie game with character, WASD controls, environmental interaction, and a playful vibe.

Cuelume — interaction sounds for the web

A tiny, dependency-free library of carefully designed Web Audio interaction sounds. The site showcases a beautiful interactive sound palette and serves as documentation for a crafted developer tool.

Diena - A Zoomable Timeline of 4M Wikipedia Events

Interactive, zoomable timeline visualization spanning from the Big Bang to present day, with 4 million Wikipedia events mapped across history. A creative data exploration tool.

Decoy Font

Interactive TTF font that combines each letter with a visual decoy, using spatial frequency separation to hide text from AI readers. Includes a working demo and free download.

Q3Edit – Browser-based Quake III map editor

Open-source, in-browser level editor for Quake III Arena. Edit, compile, and playtest .map files with TypeScript + WebGL2 frontend and id Software's q3map + ioquake3 compiled to WebAssembly. Real tool, not marketing.

Honeypot Live Stream

Real-time interactive dashboard displaying live telemetry from an SSH honeypot for security research, threat intelligence, and educational purposes. Shows attacker behavior, commands, credentials, and client fingerprints in real-time.

BambooGrid – Power Grid Modeling Tool

BambooGrid is an open-source web-based visual editor for power grid modeling and load-flow analysis. Built on Pandapower, it lets students and engineers design power networks and run simulations directly in the browser. A niche tool with genuine utility for its community.

IKEA Complexity Index

Interactive tool visualizing assembly complexity across IKEA's product catalog. Handcrafted reference site offering a novel way to explore and understand IKEA products.

Immersive Linear Algebra

Interactive linear algebra textbook with fully interactive figures. A handcrafted educational resource by academics (Ström, Åström, Akenine-Möller) covering vectors, matrices, eigenvalues, and fundamental linear algebra concepts. The first textbook to pair mathematical exposition with fully interactive visualizations.

One More Letter — Daily word game

A daily word puzzle where each round adds one more letter and rearranges into a new answer. Multiple HN frontpage mentions suggest it resonates with indie developers. However, needs manual verification: is this an indie/personal project or a commercial venture? Is it actively maintained? Does the site display personality and authorship beyond the game mechanic itself?

taken. — Since You Arrived Vol. IV

An interactive web art experience that reveals what your browser reveals about you—location, IP, device info—without asking permission or tracking. Designed as commentary on invisible data collection. Part of an ongoing creative series.

Staggering Beauty

An iconic piece of playful web art. Shake the worm. (Warning: flashing lights)

Explorable Explanations

A hub for learning through interactive, play-based exploration. Curated collection of explorable explanations and tools for creating them. Founded by Bret Victor's pioneering work.

Hackers (1995) - Animated Experience

An immersive WebGL-powered tribute to the 1995 cult film Hackers. Created by David Vidovic, this interactive experience features stunning 3D animations, the iconic soundtrack, and captures the aesthetic of 90s hacker culture and cyberpunk design.

Complexity Explorables

Interactive explorations of complex systems. Emergence, chaos, networks - play with the math.

eieio.games

Nolen Royalty's game experiments. Creator of One Million Checkboxes and other delightful web toys.

Bartosz Ciechanowski

Stunning interactive explainers on mechanical watches, GPS, cameras, and more. Engineering education at its finest.

Brilliant

Interactive courses in math, science, and CS. Learn by solving problems, not watching videos.

oimo.io

Beautiful interactive web experiments. Includes Bubbles and an infinitely zoomable Game of Life.

RegexOne

Interactive regex tutorial. Learn regular expressions step by step.

SQLZoo

Interactive SQL tutorial. Practice queries on real databases.

Learning Music

Ableton's interactive music course. Learn beats, melody, and production basics in your browser.

Learning Synths

Interactive introduction to synthesizers. Play with oscillators, filters, and envelopes in the browser.

Emoji to Scale

Explore the relative sizes of emoji objects. Scroll through a visual comparison from atoms to galaxies.

Cut The Knot

Interactive mathematics miscellany. Hundreds of puzzles, proofs, and explorations.

Social Cooling

Interactive explainer on how data collection chills free expression. How surveillance changes behavior.

tixy.land

Creative code golfing. Write a function to control a 16x16 grid of dots. Minimalist creative coding playground.

Web Design in 4 Minutes

Interactive tutorial transforming plain HTML into a beautiful page. Learn CSS fundamentals step by step.

The Physics Classroom

Physics tutorials and interactives. Clear explanations of physics concepts.

PhET Simulations

Interactive science simulations. Physics, chemistry, biology, and math.

Nicky Case

Interactive explorable explanations of complex topics. Game theory, anxiety, social networks visualized.

Neal.fun

Collection of delightful interactive experiences. Spend Bill Gates' money, explore the deep sea, draw perfect circles.

Distill

Machine learning research journal with interactive visualizations. Making ML concepts understandable.