I built a synth for my daughter
bitsnpieces.dev
How I built a portable synthesizer for my three year old daughter.
Top Show HN Launches, November 2025
Every Show HN launch from November 2025 that reached 50 or more points, most points first. For what is launching right now, see the live list.
75 launches
Top launches, November 2025
Boing
boing.greg.technology
Boing
Wealthfolio 2.0- Open source investment tracker. Now Mobile and Docker
wealthfolio.app
Private, open-source investment tracker and personal finance app. Track investments, net worth and spending locally — no account required.
I scraped 3B Goodreads reviews to train a better recommendation model
book.sv
Great book recommendations.
I made a down detector for down detector
downdetectorsdowndetector.com
I built an interactive HN Simulator
news.ysimulator.run
Browse the latest posts on Hacker News Simulator. Unlike the real HN, all comments are generated by LLMs. Posts, links, and titles are still user-submitted.
Glasses to detect smart-glasses that have cameras
github.com
Glasses to detect smart-glasses that have cameras. Ray-BANNED - NullPxl/banrays
Forty.News
forty.news
Daily news, but on a 40-year delay
Why write code if the LLM can just do the thing? (web app experiment)
github.com
Contribute to samrolken/nokode development by creating an account on GitHub.
We built an open source
github.com
zero webhooks payment processor
A CSS-Only Terrain Generator
terra.layoutit.com
An interactive CSS terrain generator. Define a grid and generate your terrain!
KiDoom
mikeayles.com
Running DOOM on PCB Traces
Epstein Files Organized and Searchable
searchepsteinfiles.com
F32
github.com
An Extremely Small ESP32 Board
Explore what the browser exposes about you
neberej.github.io
Discover all the information your browser shares automatically, including fingerprints, permissions, hardware, and privacy settings. 100% client-side, no data is sent.
Real-time system that tracks how news spreads across 200k websites
yandori.io
Track breaking news stories in real-time. See how news spreads across thousands of sources.
Browser-based interactive 3D Three-Body problem simulator
trisolarchaos.com
Free online gravity simulator. Set masses and velocities, then watch real-time 3D gravitational orbits, the three-body problem, and chaotic N-body dynamics.
My hobby OS that runs Minecraft
astral-os.org
What Is Hacker News Working On?
waywo.eamag.me
OCR Arena
ocrarena.ai
A playground for OCR models
ESPectre
github.com
Motion detection based on Wi-Fi spectre analysis
Stun LLMs with thousands of invisible Unicode characters
gibberifier.com
Gibberifier - Block AIs and web scrapers from reading your text with invisible Unicode characters while preserving meaning for humans.
Fixing Google Nano Banana Pixel Art with Rust
github.com
A tool to snap pixels to a perfect grid. Designed to fix messy and inconsistent pixel art generated by AI. - Hugo-Dz/spritefusion-pixel-snapper
Unflip
unflipgame.com
a puzzle game about XOR patterns of squares
Nano PDF
github.com
A CLI Tool to Edit PDFs with Gemini's Nano Banana
Tiny Diffusion
github.com
A character-level text diffusion model from scratch
Continuous Claude
github.com
run Claude Code in a loop
Parqeye
github.com
A CLI tool to visualize and inspect Parquet files
qqqa
github.com
A fast, stateless LLM-powered assistant for your shell
Gitlogue
github.com
A terminal tool that replays your Git commits with animation
PrinceJS
princejs.vercel.app
19,200 req/s Bun framework in 2.8 kB (built by a 13yo)
I turned algae into a bio-altimeter and put it on a weather balloon
radi8.dev
UpLink was a 491-gram high altitude balloon payload with a custom 3D printed enclosure, a LoRa image downlink, and two independent trackers. It reached the stratosphere, sent back hundreds of pictures, and we never recov
I wrote a minimal memory allocator in C
github.com
a minimal memory allocator in C. Contribute to t9nzin/memory development by creating an account on GitHub.
Runprompt
github.com
run .prompt files from the command line
RowboatX
github.com
open-source Claude Code for everyday automations
See chords as flags
rawl.rocks
Visual harmony of top composers on musescore
MTXT
github.com
Music Text Format
ReadyKit
readykit.dev
Superfast SaaS Starter with Multi-Tenant Workspaces
DBOS Java
github.com
Postgres-Backed Durable Workflows
Gametje
gametje.com
A casual online gaming platform
Build the habit of writing meaningful commit messages
github.com
Enforce the habit of self-documenting code through better commit messages. - arpxspace/smartcommit
Guts
github.com
convert Golang types to TypeScript
Tacopy
github.com
Tail Call Optimization for Python
a Rust ray tracer that runs on any GPU
github.com
even in the browser
Safe-NPM
github.com
only install packages that are +90 days old
I built a local-first daily planner for iOS
apps.apple.com
Download Daily Planner: Zesfy by Satrio Budiarto on the App Store. See screenshots, ratings and reviews, user tips and more games like Daily Planner: Zesfy.
SyncKit
github.com
Offline-first sync engine (Rust/WASM and TypeScript)
Pulse 2.0
473999.net
Live co-listening rooms where anyone can be a DJ
Cynthia
blaizenterprises.com
Reliably play MIDI music files – MIT / Portable / Windows
Hephaestus
github.com
Autonomous Multi-Agent Orchestration Framework
Awesome J2ME
github.com
Awesome list about everything related to J2ME. Documentation, academic papers, tutorials, communities, IDEs, SDKs, emulators, apps, video games. - hstsethi/awesome-j2me
MkSlides
github.com
Markdown to slides with a similar workflow to MkDocs
DroidDock
rajivm1991.github.io
A sleek macOS app for browsing Android device files via ADB
PingStalker
pingstalker.com
A macOS tool for network engineers
Encore
github.com
Type-safe back end framework that generates infra from code
TabPFN-2.5
priorlabs.ai
SOTA foundation model for tabular data
I built a wizard to turn ideas into AI coding agent-ready specs
vibescaffold.dev
A friendly 4-step wizard that helps you define, design, and plan your next app idea with AI-powered spec generation.
32V TENS device from built from scratch under $100
littlemountainman.github.io
student, nomad in machine learning
A tool to safely migrate GitHub Actions workflows to Ubuntu-slim runner
github.com
🚀 Automatically detect and migrate GitHub Actions workflows to `ubuntu-slim` for cost-efficient CI - fchimpan/gh-slimify
Cactoide
cactoide.org
Federated RSVP Platform
A WordPress plugin that rewrites image URLs for near-zero-cost delivery
wordpress.org
Image CDN for WordPress. Serve images from 300+ global edge servers. Faster Core Web Vitals, better SEO. $9.99/mo.
Mu
github.com
The Micro Network
Marimo VS Code extension
github.com
Python notebooks built on LSP and uv
A subtly obvious e-paper room air monitor
nicolin-dora.ch
This page has moved to /en/blog/epaper-room-air-monitor-part-1/.
Era
github.com
Open-source local sandbox for AI agents
Choose your own adventure style Presentation
github.com
Choose your own adventure style Presentation framework. - Skarlso/adventure-voter
Anki-LLM
github.com
Bulk process and generate Anki flashcards with LLMs
DNS Benchmark Tool
github.com
Compare and monitor resolvers
Virtual SLURM HPC cluster in a Docker Compose
github.com
A virtualised HPC cluster based on SLURM and Rocky Linux 9 - exactlab/vhpc
Geofenced chat communities anyone can create
vicinity.social
Your neighbourhood's digital community. Vicinity turns real places into community spaces. If you're inside the area, you're in the conversation.
Tusk Drift
github.com
Open-source tool for automating API tests
Find matching acrylic paints for any HEX color
acrylicmatch.com
Find matching acrylic paints for hex color values
An LLM-Powered Tool to Catch PCB Schematic Mistakes
netlist.io
Automated schematic review with full-project support and per-review cost previews for KiCad and Altium Designer.
Pipeflow-PHP
github.com
Automate anything with pipelines even non-devs can edit
Reverse perspective camera for OpenGL (Three.js)
github.com
Reverse Perspective Camera for OpenGL (Three.js). Contribute to bntre/reverse-perspective-threejs development by creating an account on GitHub.
Top launches, last 12 months
Every Show HN launch that reached 50 or more points, by the month it was posted. 1344 launches in all.