Featured Collections
Physics Simulations
N-body systems, fluid dynamics, collisions, and fundamental mechanics
Emergent Behaviors
Complex patterns arising from simple interactions
Surprising Paradoxes
Mind-bending phenomena that challenge intuition
Wardley Map Builder
Interactive strategic mapping with drag-and-drop, competitor overlays, heatmaps, and export
History of Computing
37,000 years from tally sticks to transistors — abacus, Pascaline, Babbage, Enigma, ENIAC, HP-35
Creative & Visual Arts
Generative art, animations, shaders, mathematical beauty, optical illusions, and creative tools
Physics & Scientific
Simulations, biological systems, celestial mechanics, particles, and the history of computing
Agent-Based Models
Cellular automata, social models, economics, ecology, and the massive NetLogo collection
Science & Theory
Cognitive science, mathematics, quantum physics, game theory, and cross-disciplinary paradoxes
Cathedral Grand Organ
Play a virtual cathedral pipe organ with stained glass visuals, multiple manuals, and rich Web Audio synthesis
AlphaEvolve MARL
LLM-guided evolutionary discovery of multiagent learning algorithms: VAD-CFR, SHOR-PSRO, game trees, and convergence races
Essential Simulations
Classic algorithms and mathematical modelsCellular Automata Lab
Classic and exotic cellular automata
Classic Fractals
Self-similar geometry and fractal exploration
Pendulum Dynamics
Swinging systems and chaotic motion
Oscillators & Chaos
Nonlinear dynamics and strange attractors
Mechanics & Collisions
Rigid body physics and elastic interactions
Thermal & Diffusion
Heat transfer and molecular diffusion
L-Systems
Ising Model
BZ Reaction
Fourier Epicycles
Genetic Algorithm
Procedural Terrain
Spatial Partitioning
Pathfinding
Random Walk
Ray Marching
Procedural Generation
Aircraft Maintenance Engine
Automata Theory
Finite state machines and formal language recognizers
Data Visualization
Interactive charts and information designD3.js
Data-driven documents: population spirals, force graphs, Sankey, chord, treemap, globe projections, and more
SVG Animations
Interactive SVG: anatomy explorer, periodic table, circuit schematics, gear trains, and more
Hybrid Canvas + SVG
Canvas simulations with intelligent SVG overlays: physics, fluids, boids, double pendulum, and more
Dynamic Infographics
Data Structures
American Religious Trends
80 years of demographic transformation (1940โ2024)
Timezone Comparison Tools
Schedule meetings: Miami, London, Malta, Moscow, Dubai with DST
StoryLeaf Branch Visualizer
3D interactive story tree with branching narratives and real-time growth
3D Graphics & WebGL
Real-time 3D and GPU programmingThree.js
Three.js VFX
WebGL Shaders
Complex Showcases
Interactive Visualizations
P5.js Generative Art
Creative coding with P5.js: generative patterns, particle systems, and interactive sketches
P5.js VFX
100 impressive p5.js visual effects โ flow fields, fractals, strange attractors, fluid sims, reaction-diffusion, 3D WEBGL, and more
WebGPU
Next-gen GPU compute: N-body, LBM fluid, path tracing, reaction-diffusion, and more
Advanced Technologies
Audio, WebAssembly, and algorithmsWeb Audio API
Music Sequencers
Cymatics
Sound made visible: Chladni figures, standing waves, acoustic levitation, and more
Church Organ Simulator
The King of Instruments: 3-manual pipe organ with additive synthesis and cathedral reverb
็็ฃๅ Xuanji Tu
Su Hui's 4th-century palindromic poem becomes music
WebAssembly
Visualization Algorithms
Interactive Games
Chess960 Simulator
Fischer Random Chess - explore all 960 unique starting positions
ML Visualizations
Neural networks, gradient descent, clustering, decision boundaries, and training dynamics
Modern Cryptography
RSA, AES, Diffie-Hellman, elliptic curves, hash functions, and zero-knowledge proofs
Advanced CS & AI
Search algorithms, constraint satisfaction, knowledge representation, and AI reasoning
Distributed Systems
Consensus protocols, replication, and distributed coordination
Educational Essays
In-depth explorations and visual narrativesEducational Demos
Deep-dive learning with theory, algorithms, and guided explorations
Visual Essays
Kenning Creator
Ancient Norse compound metaphors - browse, mix, and create your own
Challenge Mode
Test your understanding with gamified challenges - earn XP and master concepts
Materials Science & Crystallography
Crystal growth, phase transitions, and material propertiesPhase Diagrams
Temperature-pressure phase transitions for water
Simulated Annealing
TSP optimization through cooling-inspired search
Stress-Strain Curves
Material testing: elastic, plastic, and fracture behavior
Phonon Vibrations
Crystal lattice wave propagation and phonon modes
Dislocation Motion
Edge dislocation glide through crystal lattice
Alloy Phase Maps
Binary alloy phase diagram with eutectic points
Molecular & Chemical Simulations
Reactions, kinetics, molecular dynamics, and electrochemistryReaction Kinetics
A + B โ C molecular collision and reaction rates
Molecular Orbitals
Electron probability density cloud visualizations
Enzyme Kinetics
Michaelis-Menten enzyme-substrate binding dynamics
pH Buffer Systems
Acid-base buffering and equilibrium visualization
Polymer Chains
Random walk polymer chains and reptation dynamics
Surface Catalysis
Langmuir-Hinshelwood mechanism on catalyst surfaces
Crystal Field Theory
d-orbital energy splitting in coordination compounds
Le Chatelier Equilibrium
Dynamic equilibrium shifts under perturbation
Galvanic Cell
Electrochemical cell with ion migration and electron flow
Chemistry & Materials
Chemical bonding, material properties, crystallography, and molecular interactions
Earth & Environmental
Climate, ecosystems, fluid dynamics, and environmental systemsClimate & Weather
Atmospheric dynamics, ocean circulation, and climate phenomena
Ecology & Population
Ecosystems, species interactions, and population models
Fluid Dynamics
Flow patterns, instabilities, and continuum mechanics
Energy Systems
Renewable energy, power systems, and environmental cycles
Earth & Space Science
Plate tectonics, seismology, atmospheric layers, and planetary science
Solar Eclipse Golden Age 2026โ2028
Saros cycles, eclipse visibility paths, and shadow animation for 6 solar eclipses
5,500-Year Saros Eclipse Simulator
11,000+ procedurally generated eclipses from 3000 BCE to 2500 CE with city timelapse & historic names
Applied Sciences & Engineering
Health, transportation, robotics, and financial systemsEpidemiology Models
Disease spread, vaccination, and public health interventions
Transport & Urban Systems
City growth, traffic flow, and infrastructure networks
Controls & Robotics
PID controllers, kinematics, path planning, and autonomous systems
Financial Models
Markets, pricing, risk management, and economic dynamics
College Admissions
Agent-based model: 18 elite high schools, 20 top colleges, ED/EA/RD cycles, hooks, yield, and enrollment
Matching Market Mechanics
Supply & demand side logic: student archetypes, utility models, logit scoring, yield protection, and market clearing cascades
Space & Signals
Stellar evolution, cosmology, and digital signal processingStellar Evolution
HR diagrams, nucleosynthesis, supernovae, neutron stars, black holes
Cosmology & Universe
Big Bang, CMB, dark energy, cosmic structure, fate of the universe
Digital Signal Processing
Fourier transforms, FFT, filters, wavelets, spectrograms
Communications Systems
AM/FM, PSK, QAM, OFDM, error correction, MIMO
Quantum Physics & Relativity
Wave-particle duality, entanglement, Lorentz transformations, and spacetime curvature
Nature & Life Sciences
Biology, ecosystems, and the natural worldBioluminescence
Firefly synchronization, deep-sea anglerfish, GFP fluorescence, glowworm caves
Coral Reef Ecosystems
Bleaching, acidification, trophic cascades, spawning, reef resilience
Mycelium Networks
Wood wide web, Physarum solver, spore dispersal, forest floor ecosystems
Bird Migration
V-formation aerodynamics, magnetic compass, star navigation, global flyways
Insect Flight
Wing kinematics, vortex dynamics, hovering, and biomechanical efficiency
Biomechanics
Muscle mechanics, gait analysis, joint kinematics, and locomotion physics
Fermentation Science
Yeast dynamics, sourdough, kombucha SCOBY, beer brewing, cheese aging
Food Science
Maillard reactions, emulsions, crystallization, and cooking chemistry
Biology & Medicine
Cell biology, genetics, pharmacokinetics, and biomedical systems
Earth & Geoscience
Volcanoes, glaciers, tides, and geological forcesEngineering & Machines
Bridges, linkages, railways, and mechanical marvelsBridge Engineering
Truss analysis, suspension bridges, arch thrust lines, Tacoma Narrows flutter
Mechanical Linkages
Four-bar, Peaucellier, Chebyshev, Watt, and pantograph mechanisms
Medieval Siege Machines
Trebuchets, catapults, ballistas, battering rams, and siege towers
Railway Operations
Block signals, interlocking, marshalling yards, train dispatching
Paper Airplane Physics
Aerodynamics, glide ratios, center of gravity, and flight optimization
Architectural Geometry
Geodesic domes, catenary arches, Voronoi facades, parametric design
Engineering & Robotics
Robotic kinematics, sensor fusion, control loops, and autonomous systems
Mathematics & Patterns
Visual mathematics, algorithms, and emergent patternsOrigami Mathematics
Crease patterns, flat-foldability, Miura-ori, and rigid origami
Maze Generation
DFS, Kruskal, Prim, recursive division, and maze-solving algorithms
Sandpile Dynamics
Self-organized criticality, Abelian sandpiles, avalanche cascades
Moiré Patterns
Interference fringes, rotational moiré, grid superposition, and art
Fourier Art
Epicycles, square wave synthesis, spectrograms, and frequency-domain art
Game AI Strategies
Minimax, alpha-beta pruning, MCTS, A* pathfinding, AI tournament
Math & Geometry
Euclidean constructions, projective geometry, topology, and geometric proofs
Graph Algorithms
BFS, DFS, shortest paths, and graph traversal visualizations
Optimal Matching & Market Design
Gale-Shapley algorithm, school choice mechanisms, NRMP medical matching, and Nobel Prize-winning market design theory
Sound, Light & Optics
Acoustics, musical systems, optical fibers, and color theoryAcoustic Phenomena
Doppler effect, resonance, room acoustics, sonic booms, whispering galleries
Wind Instrument Physics
Standing waves, reed vibration, bore shapes, organ pipes, brass valves
Musical Tuning Systems
Pythagorean, just intonation, well temperament, gamelan, quarter-tone maqam
Optical Fibers
Total internal reflection, WDM, fiber Bragg gratings, photonic crystals
Color Science
CIE chromaticity, color blindness, metamerism, gamut mapping
Art, Design & Culture
Typography, textiles, dance, ceramics, and visual designTypography & Letterforms
Bézier curves, font rasterization, kerning, variable fonts, calligraphy
Textile Mathematics
Weaving drafts, braid groups, tartan design, Jacquard loom, shibori
Dance Choreography
Labanotation, spatial formations, partner dynamics, rhythm visualization
Pottery & Ceramics
Potter's wheel, kiln firing, glaze chemistry, raku thermal shock
Cartography & Projections
Mercator, Robinson, azimuthal, Tissot indicatrices, map distortion
Crazy Christmas
Holiday-themed animations: snowfall, ornaments, light shows, and festive effects
History & Civilization
Ancient systems, navigation, timekeeping, and forensicsAncient Navigation
Celestial navigation, Polynesian wayfinding, astrolabe, dead reckoning
Ancient Writing Systems
Cuneiform, hieroglyphics, Linear B, Mayan numbers, Rosetta Stone
Historical Timekeeping
Sundials, water clocks, pendulums, atomic clocks, calendar systems
Constellation Myths
Interactive star maps, asterisms, precession of ages, seasonal sky
Electoral Systems
FPTP, proportional, ranked choice, gerrymandering, Condorcet methods
Forensic Science
Fingerprint analysis, blood spatter, ballistics, DNA profiling
Chess Endgames
King and pawn, rook endings, Lucena position, tablebase explorer
Theocratic Revolutions
Taiping Rebellion, Mahdist State, Sokoto Caliphate, Taliban, Savonarola, Iran
Stable Matching
Gale-Shapley deferred acceptance, Boston Mechanism, proposer-optimality โ Nobel 2012
Stable Matching & Market Design
Complete Gale-Shapley gallery: DA, TTC, Boston, kidney exchange, NRMP, EADAM โ 2012 Nobel Prize
Stable Matching: Visual Showcase
100 artistic visualizations of matching algorithms โ p5.js, WebGL shaders, Three.js 3D, D3.js, Canvas physics, and hybrid showcases
Watercolor Pigments Explorer
Photoshop-style color picker with CIEDE2000 matching, Kubelka-Munk mixing โ Schmincke, W&N, Daniel Smith