Show HN: I made a platform to load and performance test API's

Show HN: Portowl – Simple Retro RPG

Show HN: Hatchet v1 – A task orchestration platform built on Postgres

Show HN: Transputer emulator in JavaScript (fast enough to be useful)

Show HN: The C3 programming language (C alternative language)

Show HN: GitMCP is an automatic MCP server for every GitHub repo

Show HN: uWrap.js – A 10x faster and more accurate text wrapping util in < 2KB

Show HN: I vibe coded WikiXplorer – GamePad for WikiXplorer in 20 minutes

Show HN: Monkeys.zip – 3000 Monkeys on Typewriters

Show HN: Zxc – Rust TLS proxy with tmux and Vim as UI, BurpSuite alternative

Show HN: 2x2 Generator (With Sound Effects)

Show HN: I open-sourced a tool to compare Google Play apps side-by-side

Show HN: Benchi – A benchmarking tool written in Go

Show HN: Offline JavaScript PubSub between browser tabs

Show HN: Mermaid Chart VS Code Plugin: Mermaid.js Diagrams in Visual Studio Code

Show HN: Slipstream – A Python library for stateful stream processing

Show HN: Refactored – personal time tracker with Git

Show HN: Built a visual UI editor that exports to code

Show HN: A Chrome extension to give you back control over short-form videos

Show HN: OpenNutrition – A free, public nutrition database

Show HN: Zig Topological Sort Library for Parallel Processing

Show HN: Nue – Apps lighter than a React button

Show HN: Color palettes inspired by Mexican architecture

Show HN: JavaScript PubSub in 163 Bytes

Show HN: Duolingo-style exercises but with real-world content like the news

Show HN: Terminal dashboard that throttles my PC during peak electricity rates

Show HN: I made a little puzzle game about a rogue chess knight

Show HN: Await-Tree – Visualize Async Rust Task Execution in Real-Time

Show HN: Offline SOS signaling+recovery app for disasters/wars

Show HN: Chip-8 emulator written in JavaScript

Show HN: 2004Scape (RuneScape) singleplayer self-hosted Windows/Linux/FreeBSD

Show HN: Textcase: A Python Library for Text Case Conversion

Show HN: A new VSCode extension that shows definition functions in a stack

Show HN: Make SVGs interactive in React with 1 line

Show HN: I vibecoded a 35k LoC recipe app

Show HN: Compare Cloud and Bare Metal Servers

Show HN: Smart AI tool for project planning

Show HN: A Vim plugin for displaying information on NPM packages

Show HN: I made a C program to create a vanity SHA-1 hash for a text file

Show HN: Build Your Own Security Lake – Open-Source OCSF Converters to S3

Show HN: GuMCP – Open-source MCP servers, hosted for free

Show HN: LocalScore – Local LLM Benchmark

Show HN: Haystack Code Reviewer – Guided Tours for Pull Requests

Show HN: Synto - micro-learning app to help you deeply understand classic books

Show HN: Aperture -Flip your phone case for a less distracting minimal interface

Show HN: Docsumo's OCR Benchmark Report – Surpassing Mistral and Landing AI

Show HN: Visualizing AD data for security with Python and Obsidian

Show HN: JavaScript Flowchart Generator

Show HN: Nix Ninja – open-source Ninja-compatible build system for Nix

Show HN: Hexi – Modern header-only network binary serialisation for C++

Show HN: WhatsApp MCP Server

Show HN: Physical Pomodoro Timer with ESP32 and e-paper screen

Show HN: We're Open Sourcing Our Dead Man's Switch

Show HN: Zoom-Mcp-Server]Schedule a Zoom Meeting with Anthropic MCP Help

Show HN: Bolt/Loveable for Video Editing

Show HN: Jetelina v3.0 Has Arrived

Show HN: Cloud-Ready Postgres MCP Server

Show HN: Noedge token, a currently WIP crypto for bets without any edge and fees

Show HN: FlashTokenizer – 10x faster C++ tokenizer for Python

Show HN: OCR pipeline for ML training (tables, diagrams, math, multilingual)

Show HN: StegaCube – Hide messages and files in scrambled Rubik's Cubes

Show HN: Qwen-2.5-32B is now the best open source OCR model

Show HN: All Books, All Languages (ABAL)

Show HN: Appear as anyone in video calls like zoom or Google meets

Show HN: Library to stream operating system events to AI

Show HN: Share what you dreamt about and see if others had the same one

Show HN: OC Maker

Show HN: PythonECG – A minimal real-time ECG visualization tool

Show HN: OmniTools – Self-Hosted Open-Source Swiss Army Knife for Everyday Tasks

Show HN: Calculation Hub: Every Calculation Tool You'll Ever Need

Show HN: Exponent, a collaborative AI programming agent

Show HN: Bookmarklet to Add TOC to ChatGPT's Chats

Show HN: Arrakis – Open-source, self-hostable sandboxing service for AI Agents

Show HN: Agent File (.af) – A standard file format for serializing AI agents

Show HN: I built an open-source NotebookLM alternative using Morphik

Show HN: AI-powered reading companion that helps you read hard books

Show HN: Replace Chrome new tab with a blank WYSIWYG editor for taking notes

Show HN: TypeScript as a proof assistant for intuitionistic propositional logic

Show HN: Provide LLMs markdown documentation of libraries and frameworks

Show HN: AI Supported Workout Planner

Show HN: FeedMe – An RSS Reader to Reclaim Your Attention

Show HN Pianoboi – displays sheet music as you play your piano

Show HN: Probirka – Python library for writing simple asynchronous healthchecks

Show HN: Chat with LLMs on Your Kindle

Show HN: Zocket – Zero-Configuration Sockets

Show HN: Pressure – a simple 2D board game in JavaScript

Show HN: rtrvr.ai one shotted doing taxes using Gemini 2.5 Pro

Show HN: I made Confetti: a configuration language file format

Show HN: Open-source AI text editor that runs on your own hardware

Show HN: Multi UPS SNMP based shutdown

Show HN: For those who want to stay informed without reading 10 articles

Show HN: Vibe-saver – a simplified Git for vibe coders to never lose their work

Show HN: Neuronpedia, an open source platform for AI interpretability

Show HN: SQLite? Postgres? Use both with omni_SQLite

Show HN: Oxy – build SQL bots and automations easily

Show HN: PipZap – Zapping the mess out of the Python dependencies