Show HN
"Show HN" is where developers showcase their own products and projects on HackerNews. We pick the top-scoring launches every day.
-
Vertumnus – printable posters of farmers' market produce seasonality
Show HN Printable seasonal charts showing when farmers' market produce is at its peak.
-
MultiMatte, a Promptable Image Background Removal Model
Show HN Remove image backgrounds using text or click prompts with high accuracy.
-
DOOM in the kernel, or fibers in eBPF
Show HN Runs the classic DOOM game inside the Linux kernel using eBPF fibers.
-
Filament – Fast data movement engine in Go
Show HN A high-performance Go engine for moving and streaming data between systems.
-
Art – draw one stroke, let symmetry complete it
Show HN A browser-based mandala tool that mirrors your strokes into symmetric patterns.
-
What if the speed of light was 5 km/h?
Show HN Interactive simulation showing relativistic effects if light traveled at 5 km/h.
-
Compute polynomials twice as fast
Show HN A technique to evaluate polynomials at twice the speed using clever math.
-
Self-hosted company OS, Claude Code and Codex agents in departments
Show HN Open-source company OS that deploys AI coding agents per department.
-
Rdltr – Inbox zero for your reading list
Show HN Save, tag, and read articles later with a clean distraction-free reader app.
-
Geiger – See every AI agent on your machine and what it can touch
Show HN Monitor all AI agents running locally and audit their file/system access permissions.
-
LLM Attention Visualization
Show HN Interactive tool to visualize how LLM attention heads focus on tokens.
-
DriveSync – fast Git-styled Google Drive sync CLI
Show HN A CLI tool that syncs Google Drive files using Git-like commands and workflow.
-
Copperhead – Cursor for circuit boards
Show HN AI-powered PCB design tool that lets you build circuit boards conversationally.
-
Jigsaw Haiku
Show HN A puzzle game combining jigsaw pieces with haiku poetry creation.
-
Stuxnet – A reconstructed source code of the infamous cyber-weapon
Show HN Reconstructed source code of Stuxnet, the notorious ICS-targeting malware.
-
Interactive Tree of Life
Show HN Explore the evolutionary relationships of all living species interactively.
-
Wg-admin – web UI for an existing WireGuard host
Show HN A web-based admin interface to manage your existing WireGuard VPN server.
-
HomeCat – Design your backyard office
Show HN Plan and visualize custom backyard office spaces with an easy design tool.
-
GET Together – A social network where you don't need POST to Post
Show HN A quirky social network where all actions, even posting, use HTTP GET requests.
-
Think Turing Complete, but you write the circuits in TypeScript (WIP)
Show HN A browser-based logic circuit simulator where you build circuits using TypeScript code.
-
Engrim – A universal, local-first SQLite memory engine for AI CLIs
Show HN Persistent SQLite-based memory layer that gives AI CLI tools local context.
-
Mador – Make any DOM reactive with a tiny 80-line Proxy state tuple
Show HN Lightweight 80-line library that binds reactive Proxy state to any DOM element.
-
VODForge – a free local desktop UI for YouTube video/playlist downloads
Show HN A free desktop app to download YouTube videos and playlists locally with ease.
-
Kadō – open-source habit tracker, with non-binary habit score, for iOS
Show HN An iOS habit tracker that scores habits on a spectrum, not just pass/fail.
-
Fly By – retro biplane flying game
Show HN A retro-styled browser game where you pilot a classic biplane through the skies.
-
Personal Context MCP
Show HN MCP server that gives AI assistants access to your personal context and preferences.
-
Open-Source eInk Bike Computer
Show HN A DIY open-source bike computer using an eInk display for outdoor navigation.
-
Moadim.io – A scheduler for agents
Show HN Schedule and manage time-based tasks and events for AI agents easily.
-
TERMy – A fast terminal assistant that does not use LLMs
Show HN A lightweight terminal assistant offering quick help without relying on LLMs.
-
Reactor Atlas
Show HN A comprehensive map and database of nuclear reactors worldwide.
-
The cheapest GPU cloud – H100s at $2.04/HR, H200s at $3/HR
Show HN A GPU cloud marketplace offering H100 and H200 rentals at industry-low prices.
-
OwnTime – a chess clock for your day's priorities
Show HN A chess clock-style timer that helps you track and balance daily priorities.
-
I Have Been Clawed – Index of coding agent incidents
Show HN A curated index cataloging real-world failures and mishaps caused by AI coding agents.
-
Aura – a Rust agent that investigates and fixes production incidents
Show HN An open-source Rust AI agent that autonomously diagnoses and resolves production incidents.
-
I built a version of Omarchy that runs on Apple Silicon
Show HN A macOS port of Omarchy bringing its Linux desktop experience to Apple Silicon Macs.
-
FrontierHarness Eval – 9 harness, same model, cost per pass varies 17x
Show HN Benchmarks LLM eval harnesses revealing 17x cost variance across 9 frameworks.
-
Weedout – Safari extension that hides YouTube AI-labeled videos
Show HN Safari extension that automatically hides YouTube videos tagged with AI-generated labels.
-
ZSvirt – A lightweight, scalable open source virtualization platform
Show HN Open source virtualization platform for managing VMs with minimal resource overhead.
-
HN Match Maker – Matching "Who Wants to Be Hired?" With "Who's Hiring?"
Show HN Connects Hacker News job seekers with employers using HN's monthly hiring threads.
-
Running 104GB Qwen3.8-Flash-Next on 48GB Mac with at ~12 tok/s
Show HN SlotStream enables running large 104GB LLMs on 48GB Macs via smart memory streaming.
-
Newton's Orchard – Browser-based space/gravity playground
Show HN Simulate orbital mechanics and gravity interactions directly in your browser.
-
Laser Graffiti
Show HN Draw colorful graffiti on any surface using a laser pointer and camera.
-
Floe – an open-source plugin for sample libraries – CLAP/VST3/AU
Show HN Open-source sampler plugin supporting CLAP, VST3, and AU formats for loading sample libraries.
-
SubSmith – Turn your own videos into language-learning material
Show HN Convert personal videos into interactive language lessons with subtitles.
-
Markdown Viewer and Editor
Show HN A browser-based tool for viewing and editing Markdown files instantly.
-
SlideOps – slides from a repo that flag when they drift from the code
Show HN Auto-generates presentation slides from your repo and alerts when they fall out of sync.
-
We built the smallest dual-band aircraft tracker
Show HN A tiny dual-band ADS-B receiver module for tracking aircraft in real time.
-
Corporate Mind Games – logic puzzles with a sarcastic corporate theme
Show HN Brain teasers and logic puzzles wrapped in biting workplace humor.
-
FnScribe – Open-source, offline dictation for macOS
Show HN Privacy-first macOS dictation tool that transcribes speech locally without internet.
-
An HN client that summarises long threads and lets you chat with them
Show HN A Hacker News client that summarizes threads and enables AI chat with them.
-
NFC Energy-Harvesting PCB Business Card with an MCU
Show HN A smart PCB business card powered wirelessly via NFC with an onboard MCU.
-
I missed the moving blocks, so I built a real Linux disk defragmenter
Show HN A real disk defragmenter for Linux that visually moves file blocks on ext4.
-
Typebase – A single-folder back end you write in TypeScript
Show HN Build a full back end by dropping TypeScript files into one folder.
-
Galaxium, an experimental WebGPU space explorer
Show HN Explore procedurally generated galaxies in your browser using WebGPU rendering.
-
The load-bearing vocabulary of Claude
Show HN Identifies which words in prompts most influence Claude's AI responses.
Sep 2026 TOP 10
-
The load-bearing vocabulary of Claude
Show HN Identifies which words in prompts most influence Claude's AI responses.
-
What if the speed of light was 5 km/h?
Show HN Interactive simulation showing relativistic effects if light traveled at 5 km/h.
-
Open-Source eInk Bike Computer
Show HN A DIY open-source bike computer using an eInk display for outdoor navigation.
-
Laser Graffiti
Show HN Draw colorful graffiti on any surface using a laser pointer and camera.
-
Copperhead – Cursor for circuit boards
Show HN AI-powered PCB design tool that lets you build circuit boards conversationally.
-
Running 104GB Qwen3.8-Flash-Next on 48GB Mac with at ~12 tok/s
Show HN SlotStream enables running large 104GB LLMs on 48GB Macs via smart memory streaming.
-
TERMy – A fast terminal assistant that does not use LLMs
Show HN A lightweight terminal assistant offering quick help without relying on LLMs.
-
NFC Energy-Harvesting PCB Business Card with an MCU
Show HN A smart PCB business card powered wirelessly via NFC with an onboard MCU.
-
Weedout – Safari extension that hides YouTube AI-labeled videos
Show HN Safari extension that automatically hides YouTube videos tagged with AI-generated labels.
-
Stuxnet – A reconstructed source code of the infamous cyber-weapon
Show HN Reconstructed source code of Stuxnet, the notorious ICS-targeting malware.