Best of Show HN of Apr, 2025


best of all time best of today best of yesterday best of this week best of this month best of last month best of this year best of 2024 best of 2023 best of 2023 yc w25 yc s24 yc w24 yc s23 yc w23 yc s22 yc w22 yc s21 yc w21 yc s20 yc w20 yc s19 yc w19 yc s18 yc w18 yc all-time 3d algorithms animation android [ai] artificial-intelligence api augmented-reality big data bitcoin blockchain book bootstrap bot css c chart chess chrome extension cli command line compiler crypto covid-19 cryptography data deep learning elexir ether excel framework game git go html ios iphone java js javascript jobs kubernetes learn linux lisp mac machine-learning most successful neural net nft node optimisation parser performance privacy python raspberry pi react retro review my ruby rust saas scraper security sql tensor flow terminal travel virtual reality visualisation vue windows web3 young talents
#1 Show HN: I built a hardware processor that runs Python

983 points | 265 comments | Apr 28, 2025 | by hwpythonner

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#2 Show HN: Unsure Calculator – back-of-a-napkin probabilistic calculator

930 points | 162 comments | Apr 15, 2025 | by filiph

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

923 points | 172 comments | Apr 19, 2025 | by zh2408

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#4 Show HN: Nue – Apps lighter than a React button

756 points | 568 comments | Apr 01, 2025 | by tipiirai

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

652 points | 191 comments | Apr 21, 2025 | by toebee

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#6 Show HN: Browser MCP – Automate your browser using Cursor, Claude, VS Code

616 points | 217 comments | Apr 07, 2025 | by namukang

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

575 points | 116 comments | Apr 26, 2025 | by joexbayer

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#8 Show HN: I made a Doom-like game fit inside a QR code

531 points | 136 comments | Apr 18, 2025 | by kuberwastaken

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#9 Show HN: I built a word game. My mom thinks it's great. What do you think?

513 points | 248 comments | Apr 05, 2025 | by mkate

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

472 points | 184 comments | Apr 01, 2025 | by ph4evers

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#11 Show HN: I made a web-based, free alternative to Screen Studio

462 points | 118 comments | Apr 28, 2025 | by johnwheeler

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#12 Show HN: Beatsync – perfect audio sync across multiple devices

439 points | 128 comments | Apr 29, 2025 | by freemanjiang

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

320 points | 81 comments | Apr 24, 2025 | by UnmappedStack

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

316 points | 188 comments | Apr 25, 2025 | by darajava

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#15 Show HN: OpenNutrition – A free, public nutrition database

311 points | 150 comments | Apr 03, 2025 | by joshdickson

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#16 Show HN: Undercutf1 – F1 Live Timing TUI with Driver Tracker, Variable Delay

301 points | 73 comments | Apr 19, 2025 | by deltaknight

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#17 Show HN: A Chrome extension that will auto-reject non-essential cookies

296 points | 166 comments | Apr 29, 2025 | by mitch292

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#18 Show HN: I made a free tool that analyzes SEC filings and posts detailed reports

292 points | 91 comments | Apr 13, 2025 | by GodelNumbering

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#19 Show HN: Remote-Controlled IKEA Deathstar Lamp

291 points | 55 comments | Apr 27, 2025 | by sephalon

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#20 Show HN: Lux – A luxurious package manager for Lua

268 points | 136 comments | Apr 07, 2025 | by mrcjkb

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

263 points | 120 comments | Apr 20, 2025 | by sarah-brussels

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#22 Show HN: DrawDB – open-source online database diagram editor (a retro)

263 points | 56 comments | Apr 09, 2025 | by 1ilit

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#23 Show HN: Node.js video tutorials where you can edit and run the code

258 points | 89 comments | Apr 23, 2025 | by somebee

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#24 Show HN: Plandex v2 – open source AI coding agent for large projects and tasks

257 points | 81 comments | Apr 16, 2025 | by danenania

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#25 Show HN: Goldbach Conjecture up to 4*10^18+7*10^13

244 points | 134 comments | Apr 19, 2025 | by jay_gridbach

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Don't miss when the next Dropbox or Stripe launches



#26 Show HN: A pure WebGL image editor with filters, crop and perspective correction

243 points | 86 comments | Apr 28, 2025 | by axelMI

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

240 points | 74 comments | Apr 03, 2025 | by abelanger

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

211 points | 47 comments | Apr 01, 2025 | by themanmaran

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

200 points | 43 comments | Apr 22, 2025 | by Adityav369

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#30 Show HN: Sim Studio – Open-Source Agent Workflow GUI

196 points | 58 comments | Apr 28, 2025 | by waleedlatif1

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#31 Show HN: Lemon Slice Live – Have a video call with a transformer model

195 points | 84 comments | Apr 24, 2025 | by lcolucci

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#32 Show HN: memEx, a personal knowledge base inspired by zettlekasten and org-mode

194 points | 45 comments | Apr 12, 2025 | by shibaobun

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#33 Show HN: Formalizing Principia Mathematica using Lean

188 points | 34 comments | Apr 25, 2025 | by ndrwnaguib

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

185 points | 60 comments | Apr 03, 2025 | by liadyo

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

179 points | 44 comments | Apr 25, 2025 | by anerli

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

177 points | 94 comments | Apr 22, 2025 | by akadeb

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#37 Show HN: Flowcode – Turing-complete visual programming platform

176 points | 80 comments | Apr 29, 2025 | by gabigrin

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

175 points | 185 comments | Apr 03, 2025 | by lerno

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

170 points | 38 comments | Apr 05, 2025 | by ses425500000

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#40 Show HN: Chonky – a neural approach for text semantic chunking

169 points | 35 comments | Apr 11, 2025 | by hessdalenlight

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

163 points | 89 comments | Apr 01, 2025 | by nizarmah

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#42 Show HN: AgentAPI – HTTP API for Claude Code, Goose, Aider, and Codex

163 points | 15 comments | Apr 17, 2025 | by hugodutka

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#43 Show HN: Coroot – eBPF-based, open source observability with actionable insights

162 points | 31 comments | Apr 08, 2025 | by openWrangler

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

161 points | 51 comments | Apr 22, 2025 | by segmenta

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#45 Show HN: Resurrecting Infocom's Unix Z-Machine with Cosmopolitan

157 points | 50 comments | Apr 14, 2025 | by ChristopherDrum

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#46 Show HN: I reverse engineered top websites to build an animated UI library

156 points | 102 comments | Apr 24, 2025 | by armedin

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

147 points | 49 comments | Apr 24, 2025 | by hakanshehu

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#48 Show HN: Monkeys.zip – 3000 Monkeys on Typewriters

145 points | 32 comments | Apr 03, 2025 | by yathern

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#49 Show HN: I built an app to generate story relationships using Mermaidjs

144 points | 43 comments | Apr 09, 2025 | by herol3oy

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#50 Show HN: Aqua Voice 2 – Fast Voice Input for Mac and Windows

140 points | 83 comments | Apr 09, 2025 | by the_king

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#51 Show HN: Zero-codegen, no-compile TypeScript type inference from Protobufs

138 points | 73 comments | Apr 14, 2025 | by 18nleung

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

138 points | 57 comments | Apr 02, 2025 | by msfi

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#53 Show HN: Create your own finetuned AI model using Google Sheets

137 points | 41 comments | Apr 30, 2025 | by QueensGambit

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#54 Show HN: Atari Missile Command Game Built Using AI Gemini 2.5 Pro

136 points | 140 comments | Apr 07, 2025 | by vbtechguy

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

134 points | 56 comments | Apr 21, 2025 | by dimonomid

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#56 Show HN: MCP-Shield – Detect security issues in MCP servers

134 points | 39 comments | Apr 15, 2025 | by nick_wolf

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#57 Show HN: We Put Chromium on a Unikernel (OSS Apache 2.0)

132 points | 46 comments | Apr 16, 2025 | by juecd

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#58 Show HN: Daily Jailbreak – Prompt Engineer's Wordle

130 points | 64 comments | Apr 27, 2025 | by ericlmtn

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#59 Show HN: iPhone 2005 weird "Blob Keyboard" simulator

129 points | 54 comments | Apr 05, 2025 | by juliendorra

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#60 Show HN: Bhvr, a Bun and Hono and Vite and React Starter

128 points | 96 comments | Apr 27, 2025 | by stevedsimkins

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

128 points | 58 comments | Apr 01, 2025 | by darajava

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#62 Show HN: Connecting an IBM 3151 terminal to a mainframe [video]

127 points | 44 comments | Apr 08, 2025 | by norbert_kehrer

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#63 Show HN: I vibecoded a 35k LoC recipe app

126 points | 242 comments | Apr 02, 2025 | by tomblomfield

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#64 Show HN: Comparing product rankings by OpenAI, Anthropic, and Perplexity

125 points | 35 comments | Apr 09, 2025 | by the1024

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#65 Show HN: LocalScore – Local LLM Benchmark

124 points | 25 comments | Apr 03, 2025 | by sipjca

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#66 Show HN: Nissan's Leaf app doesn't have a home screen widget so I made my own

122 points | 97 comments | Apr 14, 2025 | by kcon

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#67 Show HN: AgenticSeek – Self-hosted alternative to cloud-based AI tools

122 points | 18 comments | Apr 26, 2025 | by Fosowl

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

121 points | 21 comments | Apr 04, 2025 | by leeoniya

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#69 Show HN: Koreo – A platform engineering toolkit for Kubernetes

120 points | 44 comments | Apr 10, 2025 | by tylertreat

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#70 Show HN: I created snapDOM to capture DOM nodes as images with exceptional speed

120 points | 43 comments | Apr 27, 2025 | by tinchox6

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#71 Show HN: An MCP server for understanding AWS costs

119 points | 23 comments | Apr 25, 2025 | by StratusBen

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#72 Show HN: Badgeify – Add Any App to Your Mac Menu Bar

118 points | 53 comments | Apr 08, 2025 | by ahonn

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#73 Show HN: I486SX_soft_FPU – Software FPU Emulator for NetBSD 10 on 486SX

117 points | 42 comments | Apr 27, 2025 | by mezantrop

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#74 Show HN: ART – a new open-source RL framework for training agents

116 points | 12 comments | Apr 30, 2025 | by kcorbitt

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#75 Show HN: Uncurl.dev – Convert curl commands to a shareable, executable UI

115 points | 59 comments | Apr 07, 2025 | by darubramha

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#76 Show HN: BugStalker - a modern Rust debugger

115 points | 17 comments | Apr 25, 2025 | by godzie

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#77 Show HN: Zig Topological Sort Library for Parallel Processing

114 points | 47 comments | Apr 01, 2025 | by ww520

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#78 Show HN: I built a Rust crate for running unsafe code safely

113 points | 70 comments | Apr 06, 2025 | by braxxox

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

112 points | 21 comments | Apr 25, 2025 | by jpiech

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

109 points | 11 comments | Apr 25, 2025 | by Xiione

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

106 points | 37 comments | Apr 21, 2025 | by codingmoh

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#82 Show HN: Clawtype v2.1 – a one-hand chorded USB keyboard and mouse [video]

106 points | 27 comments | Apr 04, 2025 | by akavel

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

106 points | 15 comments | Apr 03, 2025 | by darkseid_is

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#84 Show HN: Obelisk – a WASM-based deterministic workflow engine

103 points | 27 comments | Apr 09, 2025 | by tomasol

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#85 Show HN: Attune - Build and publish APT repositories in seconds

102 points | 31 comments | Apr 18, 2025 | by ilikebits

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#86 Show HN: Heart Rate Zones Plus – The first iOS app I developed

100 points | 93 comments | Apr 28, 2025 | by tobias5

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

98 points | 58 comments | Apr 01, 2025 | by naveen_k

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#88 Show HN: Index – New Open Source browser agent

98 points | 45 comments | Apr 23, 2025 | by skull8888888

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#89 Show HN: A Common Lisp implementation in development, supports ASDF

96 points | 60 comments | Apr 27, 2025 | by andreamonaco

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

95 points | 31 comments | Apr 25, 2025 | by alexboehm

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#91 Show HN: Infat – Declaritive application assocation manager for macOS

94 points | 41 comments | Apr 24, 2025 | by philocalyst

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#92 Show HN: Pets for Cursor

93 points | 25 comments | Apr 02, 2025 | by bearware

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#93 Show HN: I built a tool to manage and compare credit card rewards

87 points | 72 comments | Apr 10, 2025 | by jsh1

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

87 points | 38 comments | Apr 24, 2025 | by dtnewman

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#95 Show HN: Memex is a Claude Code alternative built on Rust+Tauri for vibe coding

86 points | 86 comments | Apr 29, 2025 | by davidvgilmore

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#96 Show HN: I built a tool to find devs based on code, not LinkedIn titles

86 points | 71 comments | Apr 08, 2025 | by NabilChiheb

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

85 points | 24 comments | Apr 24, 2025 | by stavros

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#98 Show HN: Web-eval-agent – Let the coding agent debug itself

84 points | 12 comments | Apr 28, 2025 | by neversettles

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#99 Show HN: Offline JavaScript PubSub between browser tabs

83 points | 37 comments | Apr 03, 2025 | by l1am0

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#100 Show HN: Minimal MCP server in Go showcasing project architecture

83 points | 12 comments | Apr 07, 2025 | by TuanKiri

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andrey azimov by Andrey Azimov