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: Unsure Calculator – back-of-a-napkin probabilistic calculator

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

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

876 points | 169 comments | Apr 19, 2025 | by zh2408

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

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

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

629 points | 187 comments | Apr 21, 2025 | by toebee

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#5 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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#6 Show HN: I made a Doom-like game fit inside a QR code

526 points | 135 comments | Apr 18, 2025 | by kuberwastaken

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

513 points | 249 comments | Apr 05, 2025 | by mkate

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#8 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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#9 Show HN: OpenNutrition – A free, public nutrition database

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

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

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

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

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

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

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

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

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

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

255 points | 110 comments | Apr 20, 2025 | by sarah-brussels

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

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

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#16 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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#17 Show HN: Hatchet v1 – A task orchestration platform built on Postgres

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

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#18 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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#19 Show HN: Node.js video tutorials where you can edit and run the code

208 points | 72 comments | Apr 23, 2025 | by somebee

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

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

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

189 points | 42 comments | Apr 22, 2025 | by Adityav369

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#22 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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#23 Show HN: The C3 programming language (C alternative language)

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

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

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

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

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

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Don't miss when the next Dropbox or Stripe launches



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

168 points | 89 comments | Apr 22, 2025 | by akadeb

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

168 points | 33 comments | Apr 24, 2025 | by UnmappedStack

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

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

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

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

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

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

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

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

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

151 points | 50 comments | Apr 22, 2025 | by segmenta

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

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

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#34 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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#35 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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#36 Show HN: Zero-codegen, no-compile TypeScript type inference from Protobufs

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

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#37 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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#38 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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#39 Show HN: MCP-Shield – Detect security issues in MCP servers

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

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

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

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

130 points | 47 comments | Apr 21, 2025 | by dimonomid

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

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

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#43 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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#44 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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#45 Show HN: I vibecoded a 35k LoC recipe app

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

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

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

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#47 Show HN: LocalScore – Local LLM Benchmark

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

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#48 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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#49 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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#50 Show HN: Koreo – A platform engineering toolkit for Kubernetes

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

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

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

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#52 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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#53 Show HN: Zig Topological Sort Library for Parallel Processing

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

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#54 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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#55 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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#56 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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#57 Show HN: Open Codex – OpenAI Codex CLI with open-source LLMs

103 points | 36 comments | Apr 21, 2025 | by codingmoh

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

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

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

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

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#60 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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#61 Show HN: Pets for Cursor

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

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#62 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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#63 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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#64 Show HN: Offline JavaScript PubSub between browser tabs

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

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

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

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#66 Show HN: Torque – A lightweight meta-assembler for any processor

79 points | 30 comments | Apr 15, 2025 | by benbridle

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#67 Show HN: (bits) of a Libc, Optimized for Wasm

78 points | 16 comments | Apr 18, 2025 | by ncruces

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#68 Show HN: Novanode, Global load balancing with Caddy, no vendor lock-in

77 points | 28 comments | Apr 03, 2025 | by martianE

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#69 Show HN: ActorCore – Stateful serverless framework that runs anywhere

77 points | 12 comments | Apr 14, 2025 | by NathanFlurry

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

77 points | 7 comments | Apr 21, 2025 | by valine

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#71 Show HN: Resonate – real-time high temporal resolution spectral analysis

76 points | 30 comments | Apr 15, 2025 | by arjf

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#72 Show HN: I turned my kid's worksheet into a math game in 10 minutes with Claude

76 points | 15 comments | Apr 06, 2025 | by MattSayar

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

72 points | 15 comments | Apr 23, 2025 | by okane

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#74 Show HN: HNSW index for vector embeddings in approx 500 LOC

72 points | 12 comments | Apr 08, 2025 | by dicroce

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

71 points | 41 comments | Apr 01, 2025 | by zobweyt

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

70 points | 16 comments | Apr 22, 2025 | by vicioussquid

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#77 Show HN: Python at the Speed of Rust

68 points | 40 comments | Apr 09, 2025 | by olokobayusuf

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#78 Show HN: Single-Header Profiler for C++17

68 points | 11 comments | Apr 14, 2025 | by GeorgeHaldane

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#79 Show HN: Color palettes inspired by Mexican architecture

67 points | 4 comments | Apr 02, 2025 | by sillysideprojs

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#80 Show HN: I built a Yahoo Messenger-inspired web chat app – pure nostalgia

66 points | 32 comments | Apr 09, 2025 | by lakshikag

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#81 Show HN: I also built a word game. My mom is indifferent, but I think its ccool

65 points | 13 comments | Apr 06, 2025 | by jonathanleane

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

64 points | 29 comments | Apr 23, 2025 | by skull8888888

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#83 Show HN: Durable Python Workflows

58 points | 14 comments | Apr 22, 2025 | by itayd

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#84 Show HN: Benchi – A benchmarking tool written in Go

58 points | 7 comments | Apr 03, 2025 | by lmazgon

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#85 Show HN: Omiword – A daily, sector-based word puzzle

56 points | 63 comments | Apr 11, 2025 | by DamnInteresting

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

55 points | 7 comments | Apr 04, 2025 | by nanochess

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#87 Show HN: Make SVGs interactive in React with 1 line

54 points | 19 comments | Apr 01, 2025 | by shantingHou

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#88 Show HN: Fermi – A Wordle-style game for order-of-magnitude thinking

52 points | 36 comments | Apr 09, 2025 | by andrewrn

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#89 Show HN: A tool for creating blackout poetry

52 points | 12 comments | Apr 05, 2025 | by bobbiechen

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#90 Show HN: HN Watercooler – listen to HN threads as an audio conversation

51 points | 56 comments | Apr 17, 2025 | by sebastiennight

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#91 Show HN: A fast, minimal and offline-friendly web playground

50 points | 9 comments | Apr 06, 2025 | by evenoroddman

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#92 Show HN: Git Game Show – Multiplayer Game in Your Repo

50 points | 5 comments | Apr 09, 2025 | by justinpaulson

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

46 points | 25 comments | Apr 22, 2025 | by hp_hovercraft84

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#94 Show HN: Time Travel with Your SQL

43 points | 18 comments | Apr 10, 2025 | by modelorona

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#95 Show HN: Real-time 4/20 cannabis sales dashboard using Estuary and Tinybird

41 points | 44 comments | Apr 20, 2025 | by sv123

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#96 Show HN: I tried making YouTube safer for my kids

41 points | 33 comments | Apr 07, 2025 | by beechwood

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

41 points | 7 comments | Apr 19, 2025 | by jerryliuoft

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#98 Show HN: I Built ImgFiber-Better Image Optimizer. Free No Limits

40 points | 39 comments | Apr 06, 2025 | by iambavith

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#99 Show HN: Building better base images

38 points | 15 comments | Apr 11, 2025 | by akrylov

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#100 Show HN: I Made YC Rejection Simulator

37 points | 20 comments | Apr 13, 2025 | by hakimihsan

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andrey azimov by Andrey Azimov