Tools, games & demos

Interactive tools, computer games, visualizations, and live-data experiences.

Hall of Fame: 105
Candidates: 119
Median span: 7.8 yrs
First seen: 2008

Subtypes in Tools, games & demos

4 subtypes

Interactive tools & demos 137 links 63 Hall · 74 Candidates Visualizations & maps 46 links 25 Hall · 21 Candidates Computer games 38 links 15 Hall · 23 Candidates Live-data dashboards 3 links 2 Hall · 1 Candidates

Browse Tools, games & demos by topic

Every link below is both Tools, games & demos and the selected topic.

18 topics

Strongest Hall records

105 items

If the moon were only 1 pixel: A tediously accurate solar system model (2014)

joshworth.com 31 submissions · 30 people · 11.3 years

Hall of Fame Class of 2017-03 Resurfaced 2025-06-13

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Pointer Pointer (2012)

pointerpointer.com 18 submissions · 18 people · 13.3 years

Hall of Fame Class of 2014-11 Resurfaced 2025-10-09

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Asciiflow

www.asciiflow.com 20 submissions · 20 people · 14.2 years

Hall of Fame Class of 2014-01 Resurfaced 2025-08-27

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Explain Shell

explainshell.com 29 submissions · 29 people · 11.3 years

Hall of Fame Class of 2017-03 Resurfaced 2022-05-30

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Compiler Explorer

godbolt.org 32 submissions · 31 people · 13.6 years

Hall of Fame Class of 2020-08 Resurfaced 2022-10-16

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Universal Paperclips

www.decisionproblem.com 29 submissions · 27 people · 8.7 years

Hall of Fame Class of 2020-09 Resurfaced 2023-08-02

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Submarine Cable Map

www.submarinecablemap.com 30 submissions · 30 people · 14.0 years

Hall of Fame Class of 2017-02 Resurfaced 2025-09-07

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WebGL Water

madebyevan.com 17 submissions · 16 people · 13.7 years

Hall of Fame Class of 2014-02 Resurfaced 2025-05-10

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The True Size Of Countries: Mercator projection

thetruesize.com 21 submissions · 20 people · 9.6 years

Hall of Fame Class of 2020-11 Resurfaced 2025-04-26

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Google Earth for live radios

radio.garden 16 submissions · 16 people · 8.8 years

Hall of Fame Class of 2020-06 Resurfaced 2025-10-08

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Windows93 SP2

www.windows93.net 16 submissions · 16 people · 11.3 years

Hall of Fame Class of 2017-06 Resurfaced 2021-07-28

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What did Earth look like X million years ago?

dinosaurpictures.org 25 submissions · 23 people · 7.4 years

Hall of Fame Class of 2020-09 Resurfaced 2023-08-08

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Advent of Code 2021

adventofcode.com 24 submissions · 22 people · 10.0 years

Hall of Fame Class of 2021-12 Resurfaced 2023-11-28

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Shellcheck finds bugs in your shell scripts

www.shellcheck.net 25 submissions · 22 people · 11.9 years

Hall of Fame Class of 2021-05 Resurfaced 2023-11-23

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Shapecatcher: Draw the Unicode character you want

shapecatcher.com 17 submissions · 16 people · 13.2 years

Hall of Fame Class of 2017-05 Resurfaced 2025-01-18

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Raft Visualization

thesecretlivesofdata.com 29 submissions · 29 people · 10.7 years

Hall of Fame Class of 2022-08 Resurfaced 2024-09-27

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North American Regional Dialects and Accents (2016)

aschmann.net 11 submissions · 11 people · 15.3 years

Hall of Fame Class of 2017-09 Resurfaced 2026-04-16

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Every Noise at Once

everynoise.com 21 submissions · 21 people · 10.4 years

Hall of Fame Class of 2024-01 Resurfaced 2024-01-23

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Vim Tutorial as an Adventure Game

vim-adventures.com 18 submissions · 17 people · 14.1 years

Hall of Fame Class of 2015-03 Resurfaced 2022-09-23

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100k Stars

stars.chromeexperiments.com 13 submissions · 13 people · 11.3 years

Hall of Fame Class of 2024-05 Resurfaced 2024-05-10

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Silk

weavesilk.com 12 submissions · 12 people · 13.9 years

Hall of Fame Class of 2015-05 Resurfaced 2024-12-19

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JSLinux Now Supports x86_64

bellard.org 10 submissions · 10 people · 14.8 years

Hall of Fame Class of 2019-07 Resurfaced 2026-03-09

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Regex Crossword

regexcrossword.com 30 submissions · 27 people · 11.9 years

Hall of Fame Class of 2019-09 Resurfaced 2022-12-31

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Data Structure Visualizations

www.cs.usfca.edu 9 submissions · 9 people · 10.2 years

Hall of Fame Class of 2017-10 Resurfaced 2021-07-06

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HTTP Cats

http.cat 14 submissions · 12 people · 10.4 years

Hall of Fame Class of 2022-05 Resurfaced 2026-01-30

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Visualizing Algorithms (2014)

bost.ocks.org 15 submissions · 15 people · 11.2 years

Hall of Fame Class of 2017-07 Resurfaced 2022-07-01

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Visual and interactive way to learn Git

learngitbranching.js.org 14 submissions · 13 people · 8.1 years

Hall of Fame Class of 2024-09 Resurfaced 2024-09-15

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WTF Happened in 1971? (2019)

wtfhappenedin1971.com 7 submissions · 7 people · 6.8 years

Hall of Fame Class of 2023-09 Resurfaced 2025-01-15

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Regex 101

regex101.com 25 submissions · 20 people · 12.7 years

Hall of Fame Class of 2016-11 Resurfaced 2018-08-25

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Noclip.website – A digital museum of video game levels

noclip.website 15 submissions · 15 people · 6.8 years

Hall of Fame Class of 2023-08 Resurfaced 2025-12-19

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CyberChef – A Cyber Swiss Army Knife

gchq.github.io 10 submissions · 10 people · 7.2 years

Hall of Fame Class of 2021-04 Resurfaced 2024-02-01

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Flexbox Froggy

flexboxfroggy.com 10 submissions · 10 people · 9.2 years

Hall of Fame Class of 2022-02 Resurfaced 2023-09-30

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Game theory illustrated by an animated cartoon game

ncase.me 25 submissions · 24 people · 6.4 years

Hall of Fame Class of 2025-05 Resurfaced 2025-05-19

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How much your computer can do in a second

computers-are-fast.github.io 10 submissions · 10 people · 9.2 years

Hall of Fame Class of 2023-06 Resurfaced 2023-06-22

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The Deep Sea

neal.fun 22 submissions · 22 people · 5.0 years

Hall of Fame Class of 2023-06 Resurfaced 2024-11-19

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Elevator Saga – An elevator programming game

play.elevatorsaga.com 15 submissions · 15 people · 10.8 years

Hall of Fame Class of 2021-06 Resurfaced 2022-10-18

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Parable of the Polygons – a playable post on the shape of society

ncase.me 34 submissions · 23 people · 9.1 years

Hall of Fame Class of 2024-01 Resurfaced 2024-01-07

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Panopticlick

panopticlick.eff.org 19 submissions · 19 people · 9.7 years

Hall of Fame Class of 2019-10 Resurfaced 2019-10-25

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Kill the Newsletter – Convert email newsletters into Atom feeds

kill-the-newsletter.com 12 submissions · 11 people · 7.8 years

Hall of Fame Class of 2021-02 Resurfaced 2024-08-21 archived copy

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Hacker Typer - now you can type like a hacker in movies

hackertyper.net 16 submissions · 16 people · 13.5 years

Hall of Fame Class of 2024-10 Resurfaced 2024-10-15

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Show HN: Every mountain, building and tree shadow mapped for any date and time

shademap.app 16 submissions · 13 people · 4.9 years

Hall of Fame Class of 2024-05 Resurfaced 2024-05-31

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WebGL Fluid Simulation

paveldogreat.github.io 6 submissions · 6 people · 5.6 years

Hall of Fame Class of 2024-07 Resurfaced 2024-12-29

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NandGame – Build a Computer from Scratch

nandgame.com 13 submissions · 12 people · 7.7 years

Hall of Fame Class of 2022-04 Resurfaced 2022-04-16

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RegExr: A website for interactive regex prototyping with syntax highlighting

regexr.com 7 submissions · 7 people · 7.8 years

Hall of Fame Class of 2019-08 Resurfaced 2022-01-27

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Open Infrastructure Map

openinframap.org 12 submissions · 12 people · 7.2 years

Hall of Fame Class of 2026-01 Resurfaced 2026-01-08

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PathFinding.js

qiao.github.io 12 submissions · 11 people · 7.8 years

Hall of Fame Class of 2019-03 Resurfaced 2019-03-02

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Veloren – Voxel action-adventure role-playing

veloren.net 8 submissions · 7 people · 5.5 years

Hall of Fame Class of 2025-03 Resurfaced 2025-03-29

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User Inyerface – A worst-practice UI experiment

userinyerface.com 6 submissions · 6 people · 6.8 years

Hall of Fame Class of 2025-12 Resurfaced 2023-05-18

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Kill sticky headers (2013)

alisdair.mcdiarmid.org 11 submissions · 10 people · 10.2 years

Hall of Fame Class of 2019-12 Resurfaced 2025-02-01

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Crontab.guru – cron schedule expression editor

crontab.guru 8 submissions · 7 people · 8.2 years

Hall of Fame Class of 2019-10 Resurfaced 2021-08-30

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HTML5 Genetic Cars

rednuht.org 7 submissions · 6 people · 12.5 years

Hall of Fame Class of 2019-08 Resurfaced 2024-04-27

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Codeberg – Fast Open Source Alternative to GitHub

codeberg.org 12 submissions · 12 people · 6.3 years

Hall of Fame Class of 2023-04 Resurfaced 2025-10-01

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Online Python Tutor: Learn programming by visualizing code execution

pythontutor.com 10 submissions · 10 people · 6.5 years

Hall of Fame Class of 2016-02 Resurfaced 2016-02-29

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Principal Component Analysis Explained Visually (2015)

setosa.io 7 submissions · 7 people · 9.2 years

Hall of Fame Class of 2021-05 Resurfaced 2022-10-29

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Stuff in Space

stuffin.space 16 submissions · 16 people · 6.4 years

Hall of Fame Class of 2018-04 Resurfaced 2018-04-05

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CSS grid garden

cssgridgarden.com 6 submissions · 6 people · 7.2 years

Hall of Fame Class of 2024-06 Resurfaced 2024-06-03

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JSFuck (2012)

www.jsfuck.com 7 submissions · 7 people · 13.5 years

Hall of Fame Class of 2021-09 Resurfaced 2021-09-26

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YouTube videos that have almost zero previous views

astronaut.io 8 submissions · 7 people · 9.2 years

Hall of Fame Class of 2023-08 Resurfaced 2019-07-14

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10 years since Google said to “hang tight” about Linux support for Google Drive

abevoelker.github.io 6 submissions · 6 people · 8.2 years

Hall of Fame Class of 2022-04 Resurfaced 2022-04-24

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CSS Zen Garden

www.csszengarden.com 7 submissions · 7 people · 12.3 years

Hall of Fame Class of 2020-03 Resurfaced 2021-12-24

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Recently resurfaced in tools, games & demos

latest 20+ point return

Click

clickclickclick.click 6 submissions · 6 people · 8.0 years

Hall of Fame Class of 2023-05 Resurfaced 2026-05-18

1100max pts

North American Regional Dialects and Accents (2016)

aschmann.net 11 submissions · 11 people · 15.3 years

Hall of Fame Class of 2017-09 Resurfaced 2026-04-16

261max pts

CodingFont: A game to help you pick a coding font

www.codingfont.com 7 submissions · 6 people · 4.4 years

Hall of Fame Class of 2026-03 Resurfaced 2026-03-30

499max pts

Britain today generating 90%+ of electricity from renewables

grid.iamkate.com 7 submissions · 7 people · 6.2 years

Hall of Fame Class of 2026-03 Resurfaced 2026-03-28

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JSLinux Now Supports x86_64

bellard.org 10 submissions · 10 people · 14.8 years

Hall of Fame Class of 2019-07 Resurfaced 2026-03-09

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Candidates

Browse 119 candidates

Cdecl – Turns English phrases into C declarations

cdecl.org 21 submissions · 21 people · 15.0 years

Candidate Resurfaced 2024-11-11

Needs:2 breakout events 720+ days apart

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Draw a math symbol and get the corresponding LaTeX code

detexify.kirelabs.org 19 submissions · 18 people · 16.7 years

Candidate Resurfaced 2023-11-14

Needs:2 breakout events 720+ days apart

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Nuke Map: Interactive Nuclear Bomb Map

nuclearsecrecy.com 28 submissions · 27 people · 14.0 years

Candidate Resurfaced 2022-03-01

Needs:2 breakout events 720+ days apart

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Git Cheatsheet (Visualization)

www.ndpsoftware.com 12 submissions · 12 people · 12.4 years

Candidate Resurfaced 2023-02-07

Needs:2 breakout events 720+ days apart

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Hckr news – Hacker News sorted by time

hckrnews.com 14 submissions · 13 people · 15.6 years

Candidate Resurfaced 2022-10-03

Needs:2 breakout events 720+ days apart

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Wide-Band WebSDR – Shortwave Radio on the Internet

websdr.ewi.utwente.nl 16 submissions · 16 people · 13.2 years

Candidate Resurfaced 2022-04-20

Needs:2 breakout events 720+ days apart

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Listen to Wikipedia

listen.hatnote.com 27 submissions · 27 people · 11.1 years

Candidate Resurfaced 2020-12-28

Needs:2 breakout events 720+ days apart

140max pts

Show HN: The Deadlock Empire – Slay dragons, master concurrency

deadlockempire.github.io 16 submissions · 15 people · 8.4 years

Candidate Resurfaced 2024-07-08

Needs:2 breakout events 720+ days apart

269max pts

Scale of the Universe

www.htwins.net 24 submissions · 23 people · 12.1 years

Candidate Resurfaced 2021-12-08

Needs:2 breakout events 720+ days apart

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Pink Trombone

dood.al 9 submissions · 9 people · 8.5 years

Candidate Resurfaced 2019-01-15

Needs:2 breakout events 720+ days apart

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Are Pop Lyrics Getting More Repetitive? (2017)

pudding.cool 18 submissions · 17 people · 8.5 years

Candidate Resurfaced 2024-01-19

Needs:2 breakout events 720+ days apart

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KernType – A Kerning Game

type.method.ac 17 submissions · 15 people · 14.4 years

Candidate Resurfaced 2023-07-27

Needs:2 breakout events 720+ days apart

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Official SkiFree Home Page

ski.ihoc.net 13 submissions · 13 people · 16.0 years

Candidate Resurfaced 2023-05-17

Needs:2 breakout events 720+ days apart

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Experience the Apollo 11 Lunar Landing

www.firstmenonthemoon.com 14 submissions · 14 people · 11.8 years

Candidate Resurfaced 2024-08-30

Needs:2 breakout events 720+ days apart

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The Neural Network Zoo

www.asimovinstitute.org 10 submissions · 10 people · 9.5 years

Candidate Resurfaced 2019-12-04

Needs:2 breakout events 720+ days apart

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Can't Unsee

cantunsee.space 7 submissions · 7 people · 6.4 years

Candidate Resurfaced 2022-11-21

Needs:2 breakout events 720+ days apart

393max pts

Interactive Periodic Table

ptable.com 12 submissions · 12 people · 13.1 years

Candidate Resurfaced 2021-06-27

Needs:2 breakout events 720+ days apart

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This page is a truly naked, brutalist HTML quine

secretgeek.github.io 4 submissions · 4 people · 5.9 years

Candidate Resurfaced 2022-09-25

Needs:5 submissions

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After Dark Screensavers in CSS

www.bryanbraun.com 6 submissions · 6 people · 7.1 years

Candidate Resurfaced 2023-03-05

Needs:2 breakout events 720+ days apart

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Carbon: Create and share images of source code

carbon.now.sh 7 submissions · 7 people · 6.1 years

Candidate Resurfaced 2021-10-15

Needs:2 breakout events 720+ days apart

247max pts