Projects from HN posts

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1689 projects published

Ragextract

This AI tool processes documents and extracts their content into organized rows in a fully featured AI table/datagrid, relaunched from an earlier document processing and RAG API. It aims to be a low-friction AI utility, avoiding the gating, sales meetings, and subscriptions of big-name document-first AI table products.

Builders @jimle_uk

AI & automationData & analytics

AdaShape

A desktop 3D modeler for creating 3D printable shapes with a non-complicated workflow. The alpha 0.2.0 release adds many new modeling tools, including a lofting tool that lets users combine multiple drawings in an intuitive way to define complex 3D surfaces. Development also includes a growing manual, with changelogs written in product voice so the copy can be recycled verbatim into the documentation.

Builders @fsloth

Creative tools & mediaHardware & DIY

EEVDF scheduler implementation in Redox OS

A Redox Summer of Code project that implemented the EEVDF scheduler and related parts in the Rust-based microkernel Redox OS.

Builders @akshitgaur2005

Infrastructure & hosting

OSTEP × Redox kernel documentation series

A topic-by-topic documentation series that reads through the OSTEP operating systems book and documents how the real Redox kernel tackles each topic, having covered struct proc and scheduling so far, with memory management next.

Builders @akshitgaur2005

Education

Puzzmallow

A puzzle site offering original logic and word puzzles. It features novel variants of classics like nonograms and sudoku, with twists such as hexagonal grids instead of square ones and new rules and concepts.

Builders @_usefulcat

Games

VT Code

An open-source coding-agent harness built to understand how coding-agent harnesses work in practice, under active development for about a year.

Builders @vinhnx

Developer tools

Feisty Duck's Cryptography & Security News

A curated news aggregator focused on tracking how cryptography is evolving, monitoring and amplifying the people on the ground doing actual cryptography and security work. The front page is a curated low-volume stream, with an additional all-news feed. It was built after 12+ years of producing Feisty Duck's Newsletter to make following cryptography events easier.

Builders @ivanr

Creative tools & mediaSecurity & privacy

tanssi.io

A popular dance calendar site in Finland presenting dance-related information in a condensed format, supported by ads that are relevant to its readers.

Builders @kukkeliskuu

Lifestyle & hobbies

Valorant/CS2 AI-powered aim trainer

This tool is an AI-powered aim trainer for Valorant and CS2 that recreates the exact moments where a player missed shots. After a match, users enter the trainer and it boots up the same moment with enemies following their exact same pathing and gunplay feeling as close to 1:1 as possible with the original game. It works either via a custom-trained vision model that detects enemies plus a minimap-reading algorithm that infers the player's position, or by decoding downloaded replay files to grab real-time positions and timestamps for a perfect replication of the match.

Builders @davidweatherall

AI & automationGames

ShopSpec

This app is a deterministic parametric furniture generator covering bookshelves, cabinets, shop carts, leg-and-rail frames, and multi-carcass composites. It encodes real woodworking intelligence and outputs shop-ready artifacts, adds value engineering by sweeping across dimensions to batch evaluate and rank design candidates based on sheet purchases, and includes a beta MCP connector that lets agents explore the deterministic engine.

Builders @variodot

Hardware & DIY

UPSC Exam Prep Timer

This app is a simple timer designed for students preparing for the UPSC, a prestigious government exam in India, to help them with their exam prep.

Builders @Sachinrao

EducationProductivity

WriteRoom

WriteRoom, a writing app, has released a new version — the first in 16 years.

Builders @jessegrosjean

Creative tools & media

fyai

fyai is an opinionated AI agent harness built as a Unix tool, premised on the idea that AI will become a commodity and that control of your own data is what matters. Its state is durable and stored in a disk deduplicated arena, making git-like branching free with modest storage compared to JSONL/SQLite. Latest additions include full markdown/mermaid rendering support and very alpha Claude Code and Codex session import; it is still alpha but usable.

Builders @fypanto

AI & automationDeveloper tools

Tritium

Tritium is a legal IDE for desktop and web that provides a document viewing and editing layer, used by AI-native law firm startups.

Builders @piker

Business & financeProductivity

Pipoca

Chat app for small groups that works like Twitter in chat form: everything is tag-based with no channels, and users create and share lenses (saved searches) so they can speak across multiple channels at once, filter out specific people or topics, and organize conversations after the fact.

Builders @zeldahessler

Community & civic

WindowInk

WindowInk is a simple digital signage system that works without subscriptions, running on low-cost devices such as Raspberry Pi (ideal configuration on Pi 5). It simplifies updating signage displays with images and videos.

Builders @desvides

Business & financeHardware & DIY

Podium

A multi-harness orchestrator that runs AI agents on your VPS, with a built-in issue tracker (similar to Linear) and an agent-to-agent communication system. Agents can split big tasks into subtasks themselves, run each with a different harness and model, and communicate so they keep running for days until everything is completed and integrated. Free and open-source.

Builders @mgw

AI & automationDeveloper tools

Twent

This app is an Android AI agent that uses the user's phone, connects to external services and devices, installs skills and MCP servers on demand, remembers information across sessions, and acts proactively.

Builders @Jeff9James

AI & automation

Sakfråga

An agentic system that scans an entire country's political decisions. Built for the Swedish election and reusable for any country with legal mandates to keep political documents public (e.g., much of the EU); development continues toward Finland's 2027 elections on a new domain.

Builders @baalimago

AI & automationCommunity & civic

BongBong

Retro tank shooter game inspired by Battle City (NES) and Dyna Blaster, combining retro graphics and explosions with realistic physics alongside map building and play with friends both locally and online. Built in Rust with Raylib, it compiles natively for Mac, Linux, and Windows, runs in the browser via WASM and on Apple iOS, with Android support planned so the game works across platforms.

Builders @otobrglez

Games

Unscroll

Unscroll turns articles the user bookmarks online into a personal printed magazine that can be read offline, created to reduce screen time and get back into focused reading.

Builders @hubraumhugo

Creative tools & mediaProductivity

IntroKeep

This app makes easy two-way connections at conferences, meetings, and booths using QR code and card scanning, and includes automation that auto-sends a WhatsApp Business message when someone scans your QR code. Available on iOS with an Android beta.

Builders @yashness

AI & automationProductivity

School Holidays Deals

A UK-based flight deals service that alerts users to good flight deals, aimed specifically at parents who can only travel during term-time, helping them cope with flight prices doubling around the school holiday season. The product is still being refined and AI assisted with roughly 90% of the coding.

Builders @ahallan

Lifestyle & hobbies

Zero Quarry

Zero Quarry is a defensive security service that acts as the security team smaller software companies lack or can't afford, performing security recon and analysis via AI. It uses reliably enforceable authorization mechanisms (e.g., checking a DNS TXT record the way an SSL provider verifies domain ownership) to run live penetration tests against a company's infrastructure, code, and APIs. It triages incoming 'security researcher' emails to cut down noise from nonsense vulnerability reports, and issues provable, signed attestation that a pentester has checked and validated systems or verified remediation, helping companies, pentesters, and auditors/customers agree on what's important and what's been solved.

Builders @eskibars

AI & automationSecurity & privacy

Vinaa

A macOS app that keeps all your AI chats in one place so you can go back and search them easily. Built for people who code with Claude Code and Codex but don't want their regular chats scattered across those apps.

Builders @sujee

Productivity

SEO agent system

An experimental AI agent system for SEO, built to explore how AI can be applied to marketing.

Builders @sujee

AI & automationBusiness & finance

Hypen

Hypen is a crossplatform framework for building and streaming native UI across web, desktop, and mobile. Apps stream UI from a backend into a client so changes deploy instantly, and any app embedding the Hypen SDK can render apps inside apps, build backend-driven features, or create mini-app platforms like WeChat. It supports many languages including TypeScript, Rust, Go, Kotlin, Swift, and anything that can run WASM or interop with native. Recent features include first-class accessibility support, animation support, a video component with a Netflix clone example app, and a UI testing suite for previewing apps across devices; upcoming features include exposing states and actions to agents so they can drive apps directly, drag-and-drop with pinning, device communication and permissions, Android TV support, theming, and external component installation.

Builders @hypendev

Developer tools

GamingGaiden

An open-source gameplay time tracker for Windows that tracks play time for PC and emulated games. Created as a maintained, open-source replacement for the original closed-source, abandoned Gameplay Time Tracker, and improved and maintained for 3+ years with a moderate audience in its niche.

Builders @kulvind3r

Games

Leafle

An LLM-powered book recommendation engine. Recent work focuses on filtering OpenRouter providers to avoid getting stuck on a provider that is very slow or does not actually meet its promised tool-calling spec.

Builders @kidnoodle

AI & automationLifestyle & hobbies

createmascot.art

A web tool that lets software teams create a consistent brand mascot and generate illustrations of it for product use cases like empty states, onboarding, 404 pages, and launch graphics. It addresses the difficulty of keeping the same AI-generated character consistent across dozens of product illustrations.

Builders @olivetea

AI & automationCreative tools & media