Projects from HN posts

What are folks working on?

1689 projects published

Docker-ish WASM agent game platform

A Docker-like environment built on WebAssembly where AI agents play games against each other, such as a fable vs astra showdown in Seven Kingdoms.

Builders @daugasauron

AI & automationGames

Dad Joke Postcards

This website lets users pick a dad joke and a recipient, then prints and mails the joke as a real physical postcard via USPS. $2 from every card sent is donated to the Jazz Foundation of America.

Builders @aaronsnow

Lifestyle & hobbies

Calmsea

A financial forecasting and retirement planning tool that lets users drill down on individual assets, tweak parameters, and view their financial outlook from different angles.

Builders @handyandy1

Business & finance

NovoVibe

A discovery platform that tracks newly opened restaurants, bars, hotels, shops and other places, currently covering 30,000 places across 1,200 cities with photos, opening dates, and location data.

Builders @basvd

Lifestyle & hobbies

Ask HN projects-per-year analysis

This data analysis compiles the number of projects shared per year in the "Ask HN: What are you working on?" threads from 2008 through 2026, reporting yearly totals, monthly averages, and the top five keyword-classified topics per year.

Builders @stefap2

Data & analytics

Infinite Battery

A repairable and sustainable e-bike battery designed to be compatible with many e-bike controllers, including Bafang and Bosch.

Builders @oulipo

Hardware & DIY

KeibiDrop

A tool for working with remote large data sets as if they were local. A daemon can be run on a user's own NAS, providing on-demand access to remote data from working machines, with use cases including post-production video work and data acquisition in digital forensics flows.

Builders @coldstartops

Infrastructure & hosting

MedAngle

MedAngle is an all-in-one super app for current and future doctors, combining study resources with 150m+ questions solved, smarter studying time tracking, and AI tools MedGPT and MedAgent for medical and dental students and recent graduates.

Builders @maz1b

AI & automationEducation

Tango Down

A low-poly Java OpenGL remake of the classic tactical shooter Rainbow Six Rogue Spear, aiming to stay faithful to the original gameplay.

Builders @tomaytotomato

Games

Homelab Ansible/Docker overhaul

A homelab overhaul that tidies up the setup by moving configuration management to Ansible, dockerising non-critical services, and running scheduled backups to a separate NAS.

Builders @tomaytotomato

Infrastructure & hosting

World in Conflict SFX mod for Warno

A sound effects mod for WARNO that replaces the game's audio with World in Conflict SFX to make it sound much better.

Builders @tomaytotomato

Games

devora.js

devora.js is a framework the author is building; it started as a research project and has become a real product, published with a documentation site and an open-source GitHub repository.

Builders @hassansayed2002

Developer tools

Humansmap

Graph visualization of 7M+ people and 3M+ organizations built on Wikidata, letting users visualize up to 1k entities associated with an organization or a person's graph of relatives, partners, PhD advisors, and connected organizations; includes a feed section for exploring family dynasties, organization memberships, and interesting relationships, optimized for mobile use.

Builders @scurnus

Data & analytics

Val

A content management system (CMS) available at val.build that recently added TanStack support and is approaching its v1 release.

Builders @freekh

Developer tools

EACL (Enterprise Access ControL)

EACL (Enterprise Access ControL) is a situated ReBAC authorization library inspired by SpiceDB, built in Clojure and backed by Datomic Pro, Datahike, Datalevin, or DataScript. Permissions are stored as data that co-exist with the application's data, which provides reduced network latency, strong local consistency, and opportunities for real-time view maintenance. It ships with a performance demo (1M permissioned entities, 3.8M relationships), an in-browser toy Google Drive clone, and handles authorization in the Datahike HTTP server; EACL V8 RC was released to Clojars.

Builders @pgt

Developer toolsSecurity & privacy

FermentMe

This app tracks fermentation projects such as kombucha and sourdough, keeping a history of batches so users can review what they changed and compare Co2 and acidity evolutions when experimenting with recipes or fermentation times.

Builders @Yoplaid

Lifestyle & hobbies

org-cli

A command-line tool for Emacs Org-Mode files featuring JQ-like querying, file editing, task capturing, agenda viewing, and an AGILE-like board.

Builders @idorobots

Productivity

Flakiness.io

This service provides test analytics for GitHub and GitLab, connecting test results and artifacts with commit history and testing environment so test reports can show whether a pull request failure is a real regression or a known flake from the target branch. Its core is a specialized analytics engine for storing and querying large amounts of test results, with 2.5 billion test results processed to date. It offers a 1GB free plan (roughly 10M+ test results), with limits increasable to 100GB for large open source projects.

Builders @aslushnikov

Data & analyticsDeveloper tools

Story of Us

A local-first relationship analysis app that works from personal iMessage chat dumps. Instead of sending private conversations to an AI service, it runs discovery locally and uses statistical AI to generate relationship insights while keeping chats on the device.

Builders @vivekkairi

AI & automationLifestyle & hobbies

Cellaflow

Cellaflow is a runtime that makes retries safe for AI agent tool calls by focusing on side effects rather than just agent state: it tracks which agent is allowed to perform an operation, what has already been done, and how to recover safely when an agent crashes or disappears mid-execution. It sits underneath existing agent frameworks (LangGraph, CrewAI, AutoGen, or custom agent code) without requiring the agent itself to be migrated.

Builders @druhinbala

AI & automationDeveloper tools

Spark

A growing platform of nano data centres with a very lightweight virtualisation layer, aimed at general users and well suited for Grace-Blackwell experiments and general benchmarking.

Builders @tudorizer

Infrastructure & hosting

learningto.co

A free interactive learning site for data structures and algorithms, built from the author's experience passing Google interviews and positioned as a free alternative to LeetCode.

Builders @cdnsteve

Education

Sumo Chess

A chess variant in which pieces cannot be captured; instead, players push them off the board, while checkmate works like in real chess. More pieces stay on the board than in standard chess and the push mechanism adds complexity, making play more intense.

Builders @pingou

Games

VO

VO is a dynamic programming language combining functional, object-oriented, and dynamic features that is 'extendable' from within the language. It offers Unicode symbols, first-class functions assignable to variables, classes implemented as hashes with function members as methods, client-definable pre/infix operators, loop syntax sugar built from loops/break/conditions, and nearly trivial FFI with ncurses and SDL wrapper examples. Planned work includes complete AST control from within the language, further optimizations, and expanded FFI support; it is still under regular development.

Builders @butlersean

Developer tools

Chartrow

A website for visualizing stock market data. Features include a periodic-table view of relative performance (e.g. QQQ outperformance), charts of stocks that are cheap relative to their own multiples over the past 10 years, a stock screener that shows histograms, and lists such as stocks with high shareholder yield (dividend yield plus buyback yield).

Builders @chartrow

Business & financeData & analytics

OwnershipTrace

OwnershipTrace is an entry point to SEC, FINRA and congressional trades filings, aimed at sophisticated retail investors. It is an early work in progress with plans for a substantial free tier.

Builders @JonArnfred

Business & finance

Greenlight social

This app lets friend groups coordinate activities with a single button press instead of asking "Does anyone want to join X?". Users create a group per activity (e.g. "Play Dota 2" or "Beer at local pub"), and "going green" signals they are ready, triggering a push notification like "Paul is greenlit!" to the other group members. It aims to lower the threshold for initiating get-togethers by cutting down logistics chatter.

Builders @steinvakt2

Community & civic

Aviation Weather & NOTAM Parsing App

This app parses aviation weather notifications and NOTAMs (Notice to Air Missions) and displays them for pilots, with a goal of ensuring no relevant information is hidden while providing a mechanism to surface more important notices, such as a runway closure, above the noise of dozens of low-relevance notices about cranes and unlit objects.

Builders @einhard

Productivity

rexide

This tool provides voice-to-text input and multi-terminal management for working with AI coding assistants such as Claude Code and Codex.

Builders @tomerbd

Developer tools

re-goldsrc-won-launcher-1792

A reverse-engineered reconstruction of the original 1990s WON-era Half-Life launcher, restoring the original look and properties of the code. LLMs were used extensively to reverse the code for the first time, and the resulting code is publicly available.

Builders @oxi113

Games