A game where you build a GPU
jaso1024.com
Top Show HN Launches, April 2026
Every Show HN launch from April 2026 that reached 50 or more points, most points first. For what is launching right now, see the live list.
125 launches
Top launches, April 2026
I built a tiny LLM to demystify how language models work
github.com
A ~9M parameter LLM that talks like a small fish. Contribute to arman-bd/guppylm development by creating an account on GitHub.
Brutalist Concrete Laptop Stand (2024)
sam-burns.com
I made a laptop stand out of solid concrete, in the style of brutalist architecture, with themes of urbex and urban decay
I built a frontpage for personal blogs
text.blogosphere.app
The frontpage of the indie web. Discover the latest posts from independent blogs across the web.
Apfel
apfel.franzai.com
The free AI already on your Mac
boringBar
boringbar.app
a taskbar-style dock replacement for macOS
Smol machines
github.com
subsecond coldstart, portable virtual machines
Is Hormuz open yet?
ishormuzopenyet.com
Live status of the Strait of Hormuz
Ghost Pepper
github.com
Local hold-to-talk speech-to-text for macOS
OSS Agent I built topped the TerminalBench on Gemini-3-flash-preview
github.com
Coding Agent singularly focused efficiency and context curation. Reduces API costs by 50-80% vs other agent AND improves the code quality at the same time. Uses Hash Anchored edits, massively paral...
Honker
github.com
Postgres NOTIFY/LISTEN Semantics for SQLite
I made a YouTube search form with advanced filters
playlists.at
Advanced search for YouTube videos with filters for duration, date, title, and more.
GovAuctions lets you browse government auctions at once
govauctions.app
Search 70,000+ live government surplus auctions in one place - GSA, GovDeals, Public Surplus & more. Free, no logins, priced against 215,000+ past U.S. auction sales.
Tolaria
github.com
Open-source macOS app to manage Markdown knowledge bases
I made a calculator that works over disjoint sets of intervals
victorpoughon.github.io
VidStudio
vidstudio.app
a browser based video editor that doesn't upload your files
Real-time AI (audio/video in
github.com
voice out) on an M3 Pro with Gemma E2B
An interactive map of Tolkien's Middle-earth
middle-earth-interactive-map.web.app
An interactive map of Middle-earth: 128 events from The Lord of the Rings, The Hobbit and The Silmarillion, with journey paths and a satellite view.
PanicLock
github.com
Close your MacBook lid disable TouchID –> password unlock
A Karpathy-style LLM wiki your agents maintain (Markdown and Git)
github.com
open source grok bot. gawk bots automate your menial work via AI models and build you microapps to manage the outcome, so that you have a false sense of control. - najmuzzaman-mohammad/gawkbot
Stop paying for Dropbox/Google Drive
locker.dev
use your own S3 bucket instead
How LLMs Work
ynarwal.github.io
Interactive visual guide based on Karpathy's lecture
Oberon System 3 runs natively on Raspberry Pi 3 (with ready SD card)
github.com
This is a version based on v2.3.7 running on emulated PC i386, native Raspi Model 3b and Zero 2, and eventually Olimex ESP32-P4-PC, using existing bootloaders instead of Oberon0 - rochus-keller/Obe...
Auto-Architecture
github.com
Karpathy's Loop, pointed at a CPU
Turning a Gaussian Splat into a videogame
blog.playcanvas.com
How I turned a photogrammetric 3D Gaussian Splat scene into a playable browser FPS - with collision, pre-baked lighting, navmesh-driven NPCs and behavior-tree AI, all in PlayCanvas.
Gemma 4 Multimodal Fine-Tuner for Apple Silicon
github.com
Fine-tune Gemma 4 and 3n with audio, images and text on Apple Silicon, using PyTorch and Metal Performance Shaders. - mattmireles/gemma-tuner-multimodal
Live Sun and Moon Dashboard with NASA Footage
lumara-space.app
Live NASA solar imagery in 12 wavelengths, the moon phase tonight for 200+ cities, and real space weather. Free on iOS and Android. No ads, no signup.
GoModel
github.com
an open-source AI gateway in Go
Run TRELLIS.2 Image-to-3D generation natively on Apple Silicon
github.com
Contribute to shivampkumar/trellis-mac development by creating an account on GitHub.
I've built a nice home server OS
lightwhale.asklandd.dk
Make Linux servers fun again!
Drive any macOS app in the background without stealing the cursor
github.com
Scale computer-use 2.0 with open-source drivers, cross-OS fleets, and benchmarks for training, evaluation, and data generation. - trycua/cua
Free textbook on engineering thermodynamics
thermodynamicsbook.com
Every CEO and CFO change at US public companies, live from SEC
tracksuccession.com
Real-time dashboard tracking every CEO, CFO, and board change at US public companies. Live from SEC filings.
I built a social media management tool in 3 weeks with Claude and Codex
github.com
Open-source, self-hostable social media management platform. Schedule, publish, and manage content across 10+ platforms from a single dashboard. Free alternative to Buffer, Sendible, and SocialPilo...
sllm
sllm.cloud
Split a GPU node with other developers, unlimited tokens
Rip.so
rip.so
a graveyard for dead internet things
I built a Cargo-like build tool for C/C++
github.com
A lightweight build and workflow tool for C/C++. Contribute to randerson112/craft development by creating an account on GitHub.
Ithihāsas
ithihasas.in
a character explorer for Hindu epics, built in a few hours
M. C. Escher spiral in WebGL inspired by 3Blue1Brown
static.laszlokorte.de
CSS Studio. Design by hand
cssstudio.ai
code by agent
TurboQuant-WASM
github.com
Google's vector quantization in the browser
Prompt-to-Excalidraw demo with Gemma 4 E2B in the browser (3.1GB)
teamchong.github.io
Gemma 4 E2B runs locally in desktop Chrome. KV cache compressed 2.4× via WGSL compute shaders. 30+ tok/s on M1, no server, no API key. Chrome 134+ desktop only — needs WebGPU subgroups + shader-f16.
A cartographer's attempt to realistically map Tolkien's world
intofarlands.com
Mapping the world of Tolkien, from Valinor to Middle Earth and every age in between.
Mediator.ai
mediator.ai
Using Nash bargaining and LLMs to systematize fairness
Shader Lab
eng.basement.studio
like Photoshop but for shaders
FluidCAD
fluidcad.io
Parametric CAD with JavaScript
MacMind
github.com
A transformer neural network in HyperCard on a 1989 Macintosh
I made open source
github.com
zero power PCB hackathon badges
Agent Vault
github.com
Open-source credential proxy and vault for agents
Gemma Gem
github.com
AI model embedded in a browser – no API keys, no cloud
Made a little Artemis II tracker
artemis-ii-tracker.com
Dull
getdull.app
Instagram Without Reels, YouTube Without Shorts (iOS)
MDV
github.com
a Markdown superset for docs, dashboards, and slides with data
LangAlpha
github.com
what if Claude Code was built for Wall Street?
41 years sea surface temperature anomalies
ssta.willhelps.org
Orange Juice
oj-hn.com
Small UX improvements that make HN easier to read
Gova
github.com
The declarative GUI framework for Go
Marimo pair
github.com
Reactive Python notebooks as environments for agents
Pollen
github.com
distributed WASM runtime, no control plane, single binary
Faceoff
vincentgregoire.com
A terminal UI for following NHL games
Browser Harness
github.com
Gives LLM freedom to complete any browser task
Libretto
github.com
Making AI browser automations deterministic
Stage
stagereview.app
Putting humans back in control of code review
Utilyze
systalyze.com
an open source GPU monitoring tool more accurate than nvtop
Hippo
github.com
biologically inspired memory for AI agents
A terminal spreadsheet editor with Vim keybindings
github.com
A fast terminal spreadsheet editor with Vim keybindings - garritfra/cell
Rocky
github.com
Rust SQL engine with branches, replay, column lineage
SPICE simulation → oscilloscope → verification with Claude Code
lucasgerads.com
A demo combining LeCroy oscilloscope control, SPICE simulation, and Claude Code.
Claudraband
github.com
Claude Code for the Power User
I pipe free sports streams into Jellyfin
github.com
no ads, just HLS
Tusk for macOS and Gnome
shapemachine.xyz
Tusk — native PostgreSQL clients for macOS and GNOME. Minimal, powerful, zero telemetry.
DAC
github.com
open-source dashboard as code tool for agents and humans
Contrapunk
contrapunk.com
Real-time counterpoint harmony from guitar input
Anos
github.com
a hand-written ~100KiB microkernel for x86-64 and RISC-V
I built a DNS resolver from scratch in Rust
github.com
no DNS libraries
Moon simulator game
mooncraft2000.com
ray-casting
CodeBurn
github.com
Analyze Claude Code token usage by task
We built a camera only robot vacuum for less than $300 (well almost)
indraneelpatil.github.io
Building and deploying navigation algorithms on a home robot vacuum cleaner
Modo
github.com
I built an open-source alternative to Kiro, Cursor, and Windsurf
TinyOS
github.com
A minimalist RTOS for Cortex-M written in C
Pion/handoff
github.com
Move WebRTC out of browser and into Go
Flight-Viz
flight-viz.com
10K flights on a 3D globe in 3.5MB of Rust+WASM
AI memory with biological decay (52% recall)
github.com
Agentic AI memory with Ebbinghaus forgetting curve decay. +16pp better recall than Mem0 on LoCoMo. - sachitrafa/YourMemory
Plain
github.com
The full-stack Python framework designed for humans and agents
Adblock-rust Manager
github.com
Firefox extension to enable the Brave ad blocker
Travel Hacking Toolkit
github.com
Points search and trip planning with AI
Sycamore
sycamore.dev
next gen Rust web UI library using fine-grained reactivity
NASA Artemis II Mission Timeline Tracker
sunnywingsvirtual.com
Pu.sh
pu.dev
a full coding-agent harness in 400 lines of shell
A WYSIWYG word processor in Python
codeberg.org
A WYSIWYG word processor in Python.
OsintRadar
osintradar.com
Curated directory for osint tools
Broccoli
github.com
one shot coding agent on the cloud
We fingerprinted 178 AI models' writing styles and similarity clusters
rival.tips
Tiao
playtiao.com
A two-player turn-based board game
Real-time dashboard for Claude Code agent teams
github.com
Real-time observability of claude code sessions & multi-agents. - simple10/agents-observe
Marky
github.com
A lightweight Markdown viewer for agentic coding
The Unix Magic poster
github.com
annotated (updated)
Built a daily game where you sort historical events chronologically
hisorty.app
A daily puzzle game where you sort historical events into chronological order. How well do you know hisorty?
Ctx
github.com
a /resume that works across Claude Code and Codex
Eve
eve.new
Managed OpenClaw for work
Daemons
charlielabs.ai
we pivoted from building agents to cleaning up after them
Kontext CLI
github.com
Credential broker for AI coding agents in Go
TTF-DOOM
github.com
A raycaster running inside TrueType font hinting
A (marginally) useful x86-64 ELF executable in 301 bytes
github.com
Battery info program for x86-64 Linux laptops in 307 bytes of machine code - meribold/btry
Keeper
github.com
embedded secret store for Go (help me break it)
Druids
github.com
Build your own software factory
AgentSwift
github.com
Open-source iOS builder agent
Kloak
getkloak.io
A secret manager that keeps K8s workload away from secrets
Run coding agents in microVM sandboxes instead of your host machine
github.com
Sandboxed AI agent orchestration platform. Contribute to superhq-ai/superhq development by creating an account on GitHub.
Atomic
atomicapp.ai
Local-first, AI-augmented personal knowledge base
Go-Bt
github.com
Minimalist Behavior Trees for Go
Skrun
github.com
Deploy any agent skill as an API
Baton
getbaton.dev
A desktop app for developing with AI agents
A new benchmark for testing LLMs for deterministic outputs
interfaze.ai
A multi-source LLM benchmark across text, image, and audio that measures JSON value accuracy per field, not just schema compliance. 7 metrics, full leaderboard.
Unicode Steganography
steganography.patrickvuscan.com
Interactive demos showing how invisible Unicode characters and visual lookalikes can carry secret messages through ordinary text.
A lightweight way to make agents talk without paying for API usage
juanpabloaj.com
Kanwas
github.com
open-source shared context board for teams and agents
Holos
github.com
QEMU/KVM with a compose-style YAML, GPUs and health checks
Home Memory
github.com
A local DB of my house, down to cables and pipes
I built a navigation app that displays weather along the route
navimodo.com
Hormuz Havoc
hormuz-havoc.com
a satirical game that got overrun by AI bots in 24 hours
Weird Clocks
clocks.specr.net
A custom collection of clocks because I had a lot of time on my hands.
ctx
ctx.rs
an Agentic Development Environment (ADE)
I built a small app for FSI German Course
detawk.com
Learn German with DeTawk, a modern app built on the FSI German course, the same curriculum used to train US diplomats. Free, proven, and structured for real fluency.
TUI-use
github.com
Let AI agents control interactive terminal programs
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.