Polya's urn – essays on complexity and emergence
Beautiful interactive essays on emergence, from Pólya's urn to Conway's Life. Educational clarity meets craftsmanship.
Eye CandyRabbit HoleBig Brain
pcarolan
203mo ago
Education Projects
Education projects from Show HN — learning platforms, teaching tools, course builders, and study aids.
Chemistry Lab Simulator (for AS Level)
Replaces expensive lab equipment with exam-accurate simulation, logging precision and calculations.
Solve My ProblemZero to One
sriram_iyengar
213mo ago
Nvshmem from Scratch – RDMA, GPUDirect, and GPU Networking Demystified
NVSHMEM from scratch with RDMA, PCIe topology, GPUDirect RDMA, CUDA IPC—demystifies GPU networking internals.
Big BrainWizardryRabbit Hole
crazyguitar
103mo ago
A game where you build a GPU
Finally — a game that teaches GPU architecture instead of just using one.
Rabbit HoleZero to OneCrowd Pleaser
Jaso1024
9641872mo ago
GitHub
Generate hands-on, multi-part technical tutorials on demand, with LLM skills tuned to make content approachable. Then you work through them yourself, by hand ✋
1,402Go
●●●Banger
Lathe – Use LLMs to learn a new domain, not skip past it
Uses LLMs to teach you instead of doing the work — inverts the usual AI assumption.
Big BrainZero to One
devenjarvis
400725d ago
A playable version of the Claude Code Terraform destroy incident
Real terminal commands in your browser for incident training—no setup required.
Rabbit HoleWizardrySolve My Problem
cdnsteve
2793mo ago
Zap Code – AI code generator that teaches kids real HTML/CSS/JS
Progressive complexity engine bridges Scratch and real code better than competitors.
Zero to OneCrowd PleaserSolve My Problem
eibrahim
1223mo ago
I built a reference site for the recurring hard problems in software
151 interconnected failure patterns with AI-era distortions already included.
Dark HorseSolve My ProblemCrowd Pleaser
ludovicianul
931mo ago
Sourcelibrary.org Is Translating the Renaissance
15k+ AI-translated ancient texts with API access when most remain untranslated.
Rabbit HoleZero to OneBig Brain
dr_dshiv
805d ago
FlashAttention-2 in Cute, from Scratch
Reimplementing FA2 in CuTe from scratch is a masterclass in GPU kernel optimization.
WizardryBig BrainRabbit Hole
echen314
6225d ago
GitHub
A mobile app implementing the DISTAR phonics methodology pioneered by Siegfried Engelmann, combined with spaced repetition learning algorithms and a touch of AI.
5TypeScript
●●●Banger
Early Reader – Free open source reading app I built for my 4-year-old
Replaces a $500/month reading app with free offline DISTAR phonics and Anki-style spaced repetition.
CozySolve My ProblemDark Horse
melvinmelih
522mo ago
An interactive AI tutorial I wrote for my 11-year-old
Explains transformers to an 11-year-old with interactive playgrounds better than most courses.
CozyCrowd Pleaser
robotelvis
521mo ago
DAG-based Kanji learning through components
Visualizes kanji structure as a recursive DAG when WaniKani only uses static mnemonics.
Big BrainNiche GemSlick
barisozmen
501mo ago
Transformer Math Explorer
Best interactive transformer visualizer I've seen — finally explains tensor shapes clearly.
Big BrainRabbit HoleNiche Gem
rmst
511mo ago
TrueCitation – academic source credibility checker (URL/DOI/journal)
Cross-checks citations against 17 databases to catch AI-fabricated references instantly.
Solve My ProblemDark Horse
kitchendesign
421mo ago
A Visual Back End Engineering Interview Handbook
Timed system-design rounds with canonical prompts beat static LeetCode grind.
Solve My ProblemBig BrainSlick
officerdodles12
4021d ago
Vivix – See inside JavaScript as it executes (open source)
Event loop visualization with microtask and macrotask queues finally makes async legible.
Eye CandyCrowd PleaserZero to One
hlude
4710d ago
Cambridge AS Level Chemistry Lab Simulator
23 past papers with live reaction feedback and automated Cambridge mark-scheme grading.
Solve My ProblemShip ItSlick
sriram_iyengar
303mo ago
Monocurl – Interactive STEM animation language and IDE
Manim alternative with a dedicated IDE and live preview that actually feels modern.
Eye CandyZero to OneSlick
enigmurl
311mo ago
GitHub
8-bit computer from one NAND gate, a live-evolving neural net, and virtual CPU
24Python
●●●Banger
An 8-bit computer made from one NAND gate, and live-evolving neural net
Training a neural net to play Pong entirely inside a custom NAND-based CPU.
WizardryBig BrainRabbit Hole
ninjahawk1
311mo ago
A Turing machine simulating a Turing machine simulating a...
UTM simulating itself where L3 won't execute its first step until the year 2070.
Rabbit HoleWizardryCozy
thingoptimizer
3122d ago
Text Post
I speak Hebrew, Russian, Czech, Spanish, French, German, Arabic and Italian. I didn’t learn most of them through apps. I learned by talking to people, reading things I actually cared about and repeati
●●●Banger
I speak 9 languages. Most apps didn't work for me. So I built lairner.
Spaced repetition + reading + AI phone calls. Fixes what Duolingo broke.
Solve My ProblemBig BrainNiche Gem
simonpolyglot
233mo ago
CleverMock – An AI voice interviewer that interrupts you
Interruption mechanic makes mock interviews actually feel real—best differentiator in crowded prep space.
Solve My ProblemBig BrainShip It
devinda-dilshan
223mo ago
PaperDraw.dev – A System Design Simulator
System design meets flight simulator—watch traffic propagate, bottlenecks emerge, failures cascade.
Solve My ProblemEye CandyRabbit Hole
vhatkarpratap
203mo ago
I built a language app that generates songs from your vocab list
Music-backed vocabulary beats flashcards; backed by peer-reviewed neuroscience and shipping.
Zero to OneCrowd PleaserBig Brain
gursu8
223mo ago
Mandarin Melon – A webapp for learning Chinese by reading social media
HSK-tailored social media feeds solve the comprehensible input problem better than graded readers.
Solve My ProblemBig Brain
Wilduck
222mo ago
Points- find simple algebraic curves in the browser
Finds elegant algebraic curves through your points, like Green Globs in reverse.
Big BrainNiche GemWizardry
s_e__a___n
202mo ago
Learn languages by tilting, shaking, and smiling at your phone
Phone sensors create memory anchors instead of flashcards for language learning.
Zero to OneRabbit HoleBig Brain
mparas
211mo ago
I got tired of boring SQL tutorials, so I built a game
Real-time 1v1 SQL duels where fastest correct query wins ranking points on leaderboards.
Crowd PleaserSolve My Problem
ItaiZeilig
241mo ago
Interactive site for learning sailing physics
Vector arrows dynamically show why you can't sail straight into the wind.
Eye CandyCozyCrowd Pleaser
techfrog
201mo ago
Algotutor – Practice Go with spaced repetition in your AI agent
Spaced repetition for code where the AI generates sub-problems instead of showing solutions.
Big BrainNiche GemShip It
zuzuleinen
211mo ago
Learn how AI benchmarks cheat
Teaches you to spot when benchmark scores are noise versus signal before you trust a paper.
Big BrainRabbit Hole
adamgold7
201mo ago
Books ranked by how many Wikipedia article translations they have
Using Wikipedia translation counts as a proxy for cultural significance is genuinely clever.
Rabbit HoleDark HorseBig Brain
nihilpista
2024d ago
Interactive first-principles climate physics simulation with explainer
Layer-by-layer physics simulation teaches climate science better than any textbook video.
Rabbit HoleBig BrainEye Candy
crackalamoo
2021d ago
Hacker's Guides
Travel guides for historic code like ELIZA make legacy source finally readable.
Niche GemRabbit HoleCozy
abrax3141
202d ago
Rungs.dev – IDE for PLC AOIs with Structured Text and Ladder Logic
First free in-browser PLC IDE with ladder logic, tests, and trend analysis—no hardware needed.
Niche GemZero to OneCozy
Dagryl
103mo ago
You Broke Prod – A game where you debug production incidents
Incident response training game that's actually addictive—beats PowerPoint.
Crowd PleaserSolve My Problem
cdnsteve
103mo ago
Learn distributed ML by playing a sci-fi browser game
Hands-on distributed ML simulator—gamified learning for tensor parallelism without spinning up clusters.
Rabbit HoleBig BrainEye Candy
zhebrak
113mo ago
Ivy – the first proactive, offline AI tutor
Proactive AI tutor that calls students offline—genuine differentiation vs passive reactive tutors everywhere.
Zero to OneBold BetSolve My Problem
zeshama
103mo ago
Aprender – A language app built for European Portuguese (not Brazilian)
Duolingo teaches Brazilian — this is the only app built for European Portuguese from the ground up.
Niche GemSolve My ProblemSlick
joshmxtth
103mo ago
AI News for Kids
Finally, AI news formatted for kids with privacy-first design and no tracking or data storage.
Niche GemCozyZero to One
quodlibet
152mo ago
Interactive first-principles climate physics simulation with explainer
Layer-by-layer climate physics you can actually watch unfold in 3D.
Rabbit HoleEye CandyBig Brain
crackalamoo
102mo ago
GitHub
Translate and simplify EPUB books to a target CEFR language level using an LLM
4Rust
●●●Banger
Nheengatu – CLI tool to simplify books to your language level with LLMs
Two-pass simplify-then-translate pipeline beats single-pass by 15–25% on vocabulary.
Big BrainNiche GemSolve My Problem
pdrgds
102mo ago
Glassroom – See what's happening in your kid's Google Classroom
Aggregates every Google Classroom assignment into one dashboard without needing API access.
Solve My ProblemBold Bet
sageframe
101mo ago
Open Vibe – free, open-source agent-led web dev course
Turns Claude Code into a patient tutor that explains your actual code, not toy examples.
Big BrainSolve My ProblemCozy
hot_town
101mo ago
I Built a Guide to the Manifold Shift in Mechanistic Interpretability
Wiggly interactive ruler demo proves why straight-line concept mapping fails in high dimensions.
Rabbit HoleEye CandyBig Brain
jdcampolargo
101mo ago
GitHub
Build a modern LLM from scratch. Every line commented. Explained like we are five.
2,231Jupyter Notebook
●●●Banger
How-to-Train-Your-GPT
Build a LLaMA-style model from scratch with zero ML prerequisites or math.
CozyBig Brain
RaiyanYahya
101mo ago
An interactive atlas of Crusader-era sites in the Kingdom Of Jerusalem
Hand-curated atlas mapping 170 Crusader sites onto modern geography with surviving remains.
Rabbit HoleNiche GemEye Candy
mintycake
1029d ago