Show HN: My self-written hobby OS is finally running on my vintage IBM ThinkPad

Show HN: Fix unplayable tracks in Spotify playlists

Show HN: Diffulab, a library to train diffusion models from scratch

Show HN: E2fsgui – Simple Electron GUI to Access Linux Ext2/3/4 Disks on macOS

Show HN: I used OpenAI's new image API for a personalized coloring book service

Show HN: Formalizing Principia Mathematica using Lean

Show HN: Empty Enter Expander – Type less in the terminal with this tool

Show HN: Magnitude – open-source, AI-native test framework for web apps

Show HN: GS-Calc – A modern spreadsheet with Python integration

Show HN: Colanode, open-source and local-first Slack and Notion alternative

Show HN: Faasta – A self-hosted Serverless platform for WASM-wasi-HTTP in Rust

Show HN: BugStalker - a modern Rust debugger

Show HN: Logiquiz – Daily Self-Referential Puzzles

Show HN: I built Lovable for text bots and mini apps

Show HN: Infat – Declaritive application assocation manager for macOS

Show HN: Zev – Remember (or discover) terminal commands

Show HN: I made my own TRMNL e-ink device

Show HN: I built an AI that turns GitHub codebases into easy tutorials

Show HN: MemoryCore – symbolic, peer-to-peer memory system for AI

Show HN: Rowboat – Open-source IDE for multi-agent systems

Show HN: An interactive demo of QR codes' error correction

Show HN: My from-scratch OS kernel that runs DOOM

Show HN: Index – New Open Source browser agent

Show HN: Morphik – Open-source RAG that understands PDF images, runs locally

Show HN: SnipFast – Extract Highlighted Text from Physical Books

Show HN: VacayBuddy – PTO Management Inside Slack (Open Source)

Show HN: RSS Lookup – Find RSS Feeds for Any URL (Free, Open Source)

Show HN: StackHound - Stop guessing repo's tech stack, analyze it in seconds

Show HN: I Added Translation to My RSS Reader Project

Show HN: Photo.codes – Free, privacy-first photo editor for the web

Show HN: We made a blazing-fast, open-source GitHub front end

Show HN: I open-sourced my AI toy company that runs on ESP32 and OpenAI realtime

Show HN: AI Overview Hider for Google

Show HN: VSCode-remote-glibc-patch – Patch legacy Linux to use VSCode Remote

Show HN: OpenWrt Configurator – Simple config management for OpenWrt devices

Show HN: Dia, an open-weights TTS model for generating realistic dialogue

Show HN: Lucidia, a WebGL visualizer inspired by Drempels

Show HN: TabTab – A keyboard-first browser workspace for tab hoarders

Show HN: Open Codex – OpenAI Codex CLI with open-source LLMs

Show HN: Open-Source, Self-Hostable Rate Limiting API

Show HN: Advanced-Alchemy – A framework agnostic library for SQLAlchemy

Show HN: Claude Code with GUI and Block Based Prompt Editor (MIT)

Show HN: Spritepaint – Make and animate pixel art in the browser

Show HN: GitNote- Online MD note editor that syncs to GitHub

Show HN: Durable Python Workflows

Show HN: Dosidicus – A digital pet with a simple neural network

Show HN: Body Controlled 3D Dino Game

Show HN: Dia-Jax – A Jax port of the Dia text-to-speech dialogue model

Show HN: Zenkan – Drag and drop your notes in flexible nested boards

Show HN: Loat – Grow MRR with automated emails

Show HN: KRDS – Korea Government Design System in React and MUI

Show HN: Pomo – Manage your Stripe promo codes without code

Show HN: Turn Rails REST APIs into Model Context Protocol (MCP) Servers

Show HN: Moose – OSS framework to build analytical back ends with ClickHouse

Show HN: FundMyServer – Verified micro-sponsorship for indie dev server/API cost

Show HN: Nerdlog – Fast, multi-host TUI log viewer with timeline histogram

Show HN: Seachan – Censorship Resistant Decentralized Fileboards

Show HN: Document agent example that can parse and chat over unstructured data

Show HN: Mailfrom.dev – A Cheaper MailTrap Alternative

Show HN: Chrome and Firefox extension to right-click and verify a link is safe

Show HN: I built a Ruby gem that handles memoization with a ttl

Show HN: I built a No Code Dockerized MCP Server for any API - AI Agent

Show HN: Keep your PyTorch model in VRAM by hot swapping code

Show HN: JuryNow – Get an anonymous instant verdict from 12 real people

Show HN: Light like the Terminal – Meet GTK LLM Chat Front End

Show HN: Fullstack Go app (SSRfront end+APIback end+Docker) with clean structure

Show HN: Find a random wedding website

Show HN: TSCE – Think Before You Speak (Two-Step Contextual Enrichment for LLMs)

Show HN: Nowrite.fun – If you stop typing, your text disappears

Show HN: Trailmarks – Huge, browser-based, Carmen Sandiego-style travel game

Show HN: I hate cubes, so I vibe coded a game to destroy them

Show HN: Interactive map of Palo Alto police record log PDFs

Show HN: Join an Open Tailscale Network

Show HN: Web Video editor, 100% local, AI subtitle, auto cut based on volume

Show HN: I made an AI copilot for Maps that answers open-ended map questions

Show HN: Chat with AI copies of all HN users, like sama, dang, and even yourself

Show HN: I built a visual topic explorer for SEOs and content creators

Show HN: Safari extension that adds Chrome-style bookmark star to the toolbar

Show HN: Type Japanese an app to practice typing Japanese keyboard

Show HN: I built a "GitHub for SEOs" to solve the portfolio problem

Show HN: MCP MCP – an MCP server to list MCP servers

Show HN: ParseLM – Reliably Structure LLM Outputs for Data and Control Flow

Show HN: Turbine – A scripting language for C/C++ with Markdown-like syntax

Show HN: Molecule-Rs – A Fast Protein Visualization Engine Written in Rust

Show HN: An all-in-one blog for learning Large Language Models (LLMs)

Show HN: A Standalone/GitHub CLI Extension to Preview GitHub Flavored Markdown

Show HN: MidiMaker.pro – Generate structured MIDI music from text using LLMs

Show HN: SoundLeaf – iOS Client for Audiobookshelf Server

Show HN: Itsi – all-in-one HTTP server and proxy with first-class Ruby support

Show HN: Bloggr – a Next.js blogging engine (open-source; MIT)

Show HN: MCP Manager – Open-Source CLI to Manage Your MCP Servers

Show HN: BioLight – Passive entropy engine: raw randomness and 0 post-processing

Show HN: Hyprnote – VSCode for Meeting Notes (Open-Source and Local-First)

Show HN: A tool that makes numbers pop, flip, shrink, or emoji-fy using Unicode