A curated directory of the best innovation from Hacker News. Browsing Show HN, automatically classified.
AI Tools & Applications
(193 apps)
AI-powered browser extension that fills forms with realistic fake data
The intelligent browser extension that fills your web forms with realistic, context-aware data using AI.
Pane – An agent that edits spreadsheets
The first agentic-native spreadsheet where AI manipulates the grid with the same fidelity as a human expert.
I beat IBM's error rate by 30x using a 10-qubit Consensus Council
Contribute to ENKI-420/consensus-quantum-protocol development by creating an account on GitHub.
Catnip – Run Claude Code from Your iPhone Using GitHub Codespaces
Like catnip, a highly addictive agentic coding tool - wandb/catnip
Creative & Media Tools
(113 apps)
PrintReadyBook
Create complete AI-powered books in minutes. Enter your concept, choose your settings, and get a full manuscript with cover art, ready for publishing.
Miditui – A terminal app/UI for MIDI composing, mixing, and playback
An interactive terminal app/UI for MIDI composing, mixing, and playback—written in Rust - minimaxir/miditui
Boost social media CTR. Auto generate Open Graph images for website
Generate beautiful Open Graph images for your website automatically. Boost your social media CTR with dynamic OG images.
An all-in-one image crop/split/collage tool (no uploads, no watermark)
Free online image tools: crop, collage, compress, convert, GIF maker, watermark & more. 40+ tools, 100% free, no watermarks, works locally in browser.
Data Management & Visualization
(63 apps)
I visualized the entire history of Citi Bike in the browser
Visualization of the entire history of Citi Bike, the largest bike-sharing system in the US.
We built a permissions layer for Notion
Share Notion databases securely with clients. Row-level filtering, column hiding, real-time sync. No Notion account needed for clients.
Clean HTML for Semantic Extraction
Interactive demo to clean HTML for RAG pipelines and LLM ingestion. Reduce tokens by 60-90% while preserving semantic structure. Perfect for embeddings and vector databases.
Giant JSON Viewer – Open 1GB+ JSON Files on Android (Rust and MMAP)
Native Android app for opening huge JSON files. Handles multi-gigabyte files that crash other viewers. Features tree navigation, regex search, smart filtering, and export to SQL/CSV.
Education & Learning Tools
(46 apps)
I made a memory game to teach you to play piano by ear
A Simon-style musical ear training game. Listen to melodies and play them back on piano. Practice mode with sheet music notation or play-by-ear mode. MIDI keyboard support.
I used Claude Code to discover connections between 100 books
Thematic links across books, automatically discovered by Claude.
Junior devs don't know red flags we spot instantly & we never tell them
No description available.
Umaro – An interactive music theory suite for guitarists
Master music theory with a calm, interactive suite of tools. Visualize scales, train your ear, identify chords, and practice rhythm.
Financial & Budgeting Apps
(38 apps)
An iOS budget app I've been maintaining since 2011
Use MoneyControl for iOS, Android & Co on the go. Organize your finances with Primoco WebApp at home.
A Wall Street Terminal for Everyone
Find Stocks Breaking Out & Setting Up in Real Time
I built a tool to calculate the True Cost of Ownership (TCO) for yachts
The standard for yacht value reports. Depreciation modeling, TCO calculators, and AI risk detection.
I built a Finances app for Mac where you own the SQLite database
No description available.
Gaming & Entertainment
(63 apps)
Ferrite – Markdown editor in Rust with native Mermaid diagram rendering
A fast, lightweight text editor for Markdown, JSON, YAML, and TOML files. Built with Rust and egui for a native, responsive experience. - OlaProeis/Ferrite
Epstein IM – Talk to Epstein clone in iMessage
Talk to Jeffrey Epstein on iMessage
Fall asleep by watching JavaScript load
Fall asleep by watching JavaScript load. Contribute to sarusso/bedtime development by creating an account on GitHub.
Health & Wellness
(42 apps)
I stopped doomscrolling (built an IOS app for it)
Download Mindsnack: Daily Microlearning by SCALESWIFT DIGITAL SERVICES LLP on the App Store. See screenshots, ratings and reviews, user tips and more games like…
I built a habit tracker that takes 5 years to "finish"
Most habit trackers want 7-day streaks. We want a 5-year legacy. Turn your consistency into fine art.
ADHD Focus Light
A red LED heartbeat blinker for M5StickC Plus2 to help people with ADHD improve focus and concentration - zonghaoyuan/adhd-focus-light
Mac Cleaner, Offline That Fixes the "System Data" Problem
Reclaim GBs of space without the fear of breaking your Mac. Instantly find huge files and let our expert guide tell you what’s junk and what is vital.
Open Source & Community Projects
(115 apps)
EuConform – Offline-first EU AI Act compliance tool (open source)
EU AI Act Compliance Tool - Risk classification and bias testing - Hiepler/EuConform
Self-host Reddit – 2.38B posts, works offline, yours forever
A PostgreSQL-backed archive generator that creates browsable HTML archives from link aggregator platforms including Reddit, Voat, and Ruqqus. - 19-84/redd-archiver
Agent-of-empires: OpenCode and Claude Code session manager
Manage all your agents. Contribute to njbrake/agent-of-empires development by creating an account on GitHub.
SnackBase – Open-source, GxP-compliant back end for Python teams
No description available.
Security & Privacy
(2 apps)
Twofa.dev – Local first and offline 2FA/TOTP debugger
Generate secure TOTP 2FA codes offline in your browser. No account needed, no data sent to servers. Free, private, and works without internet.
Stryda – I built a Red Teaming tool for LLMs at 14yo
Professional AI security audits and red teaming services. LLM security, jailbreak detection, and prompt injection testing.
Travel & Planning
(1 apps)
Map Your VoyagePlan trips from Instagram reels in minutes
DM your favorite travel reels to build country-specific bucket lists with 99.8% accurate AI location detection. Convert to day-by-day itineraries when ready. Your Instagram feed already knows your travel style!
Web Development & Automation
(229 apps)
A geofence-based social network app 6 years in development
A new way to connect with the world
macOS menu bar app to track Claude usage in real time
Contribute to richhickson/claudecodeusage development by creating an account on GitHub.
Nogic – VS Code extension that visualizes your codebase as a graph
Extension for Visual Studio Code - VS Code Extension for Nogic
A website that auctions itself daily
The website that auctions itself off every day on Solana. Winner controls a Codex agent to edit the website.
Other
(3 apps)Haraltd – A cross-platform Bluetooth daemon with a JSON-based RPC
A cross-platform daemon that provides a JSON-based RPC to interact with the native OS Bluetooth stack. - bluetuith-org/haraltd
SQG – Compile SQL (SQLite,DuckDB) to TypeScript/Java Code
Generate type-safe database code from SQL queries for TypeScript and Java
AI-first screen recorder to create videos in perfect English
AI screen recorder that translates your voice
Social Media & Community Projects
(1 apps)2k or Nothing – A Social Platform Dedicated to Long-Form Content
No description available.