HN Showcase — Visual Gallery for Show HN

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27 projects

GitHub

Realtime 3D thermal analysis and heat transfer simulation

12C++

Data

●●Solid

ParaMetal: A realtime 3D heat transfer simulation

Voronoi-based meshless discretization running realtime thermal simulation on Vulkan GPU.

WizardryBig Brain

damian0710m

102h ago

Data

●Mid

Startup research website, crunchabse and Product Hunt and grokipedia

Free Crunchbase alternative powered by AI agents, but the category is extremely crowded.

Ship ItDark Horse

shpran

318h ago

GitHub

A CLI tool that turns your Python scripts into a parallel data processing engine

3Rust

Data

●●Solid

Ril: a parallel data streaming tool for Python

4x speedup over pandas with constant memory via streaming workers.

Solve My ProblemBig Brain

dpesic

2013h ago

Data

●●●Banger

Countrycheck: which country is this point in?

323KB dataset does offline country lookup in microseconds with no server calls.

WizardryBig BrainNiche Gem

jaakl

3121h ago

Text Post

Constant time recursive filter for moving linear regression. Works for any window size k. Formula in the first comment.

Data

●Mid

O(1) Recursive Moving Linear Regression

O(1) linear regression formula with no implementation to evaluate.

Big Brain

Pierdimi

2323h ago

Data

●●Solid

When Will AI? – A timeline of top AI predictions

Centralized timeline tracking AI predictions from Amodei, METR, and Forrester.

Niche GemCozy

jaymeh13

601d ago

Data

●Mid

Made my own analytics, Google Analytics let me down

Custom GA alternative for tracking your own trivia games specifically.

Niche Gem

captaincrunch

201d ago

Data

●Mid

We polled 2,122 Americans on AI and regulation, and built a visualizer

Real survey data with demographic breakdowns, but it's just charts and a quiz.

Cozy

appleslicemusic

531d ago

Data

○Pass

A-C Coupling – Deterministic Data Decomposition in O(n) with No Search

403 Forbidden error means there's nothing to evaluate here.

A19dammer91

302d ago

GitHub

High-Performance GPU Super Bloom Filter

1Cuda

Data

●●Solid

cuSBF – faster Bloom filter on GPUs for DNA sequences

92× faster insert and 234× faster query than CPU Super Bloom on GPU.

WizardryNiche Gem

tdortman

202d ago

Data

●●Solid

Passport rankings weighted by where people travel

Tourism-weighted passport rankings beat Henley's simple country count.

Big BrainNiche Gem

Icons8

312d ago

GitHub

A fast embedded graph database for AI applications and graph analytics

3Rust

Data

●●Solid

IssunDB – a new embedded graph database with vector and text search

Sparse matrix graph operations with MCP server integration for AI agents.

Big BrainShip It

habedi0

403d ago

Data

●●Solid

Kardashev Labs – live US grid data (LMP, curtailment, queues, demand)

Seven ISOs unified into one interface — replaces seven browser tabs for energy developers.

Solve My ProblemNiche Gem

AShoeToast

204d ago

Data

●●Solid

Metro Match – compare 18 world metro systems as playable stat cards

Playable stat cards for 18 metro systems with dated OSM-sourced data.

CozyNiche Gem

poppypetalmask

204d ago

GitHub

Streaming metrics compression engine. 100M events → 93 KB.

4Python

Data

●●●Banger

Sketchlog – 100M events compressed to 93 KB using streaming sketches

100M events to 93 KB with constant memory using probabilistic sketches.

WizardryBig Brain

BALAVIGNESH321

104d ago

Data

●●Solid

StackScope – I crawled over 40k indie launches to see what they ship

Reveals indie launch trends like Vercel hosting 33% of new products.

Dark HorseNiche Gem

datafreak_

67204d ago

GitHub

RedNotebook AI : open-source AI data notebook. Notebook-first UI (Next.js + shadcn/ui) over a FastAPI backend, with AI SQL/chart suggestions, profiling, PII detection, and a NotebookLM-style knowledge layer.

2TypeScript

Data

●●Solid

RedNotebook AI open-source AI data notebook for Trino, +12 SQL engines

NotebookLM-style citations for SQL results when Hex and Mode already exist.

Solve My ProblemShip It

heruwala

104d ago

Data

●●Solid

Live 3D map of London with planes, trains, buses and boats

Multi-source transit integration is clever, but Citymapper already does this better.

Rabbit HoleEye Candy

drpancake

404d ago

Data

●●Solid

Real-time ISS tracker with live NOAA solar wind visualisation

Live solar wind visualization layered over ISS tracking—neat combo nobody asked for.

Eye CandyCozy

mujib77

405d ago

Data

●●Solid

Free API for social post metrics – URL in, views/likes/comments out

No-auth social metrics API across 8 platforms, but scraping maintenance is a real concern.

Crowd PleaserShip It

patwalls

125d ago

Data

●Mid

Domain Rating – a leaderboard of startup website Domain Ratings

Ahrefs API wrapped in a retro leaderboard — TrustMRR but for domain rating.

Cozy

nocodeg

305d ago

GitHub

Free open-source Google Maps scraper — Chrome extension to extract business leads (name, address, phone, website, email) from Google Maps, Yandex Maps & 2GIS and export to CSV/Excel. No API key, no account.

4TypeScript

Data

●Mid