Show HN Daily Selection (2025-06-11)
- I made a 3D printed VTOL drone
- A "Course" as an MCP Server
- Chili3d – A open-source, browser-based 3D CAD application
- MidWord – A Word-Guessing Game
- High End Color Quantizer
- PyDoll – Async Python scraping engine with native CAPTCHA bypass
- I built a loadout building and sharing tool for Helldivers 2
- A MCP server and client implementing the latest spec
- I am making an app to rival "Everything"
- Viberunner – build personal desktop apps in seconds
- macOS app PhotoSort could help reduce your monthly iCloud bill
- Zymo.tv
- Pyleak – Detect asyncio issues causing AI agent latency
- AI-Powered Music Creation Starts Here – Vibe Musicing
- An AI tutors that teaches AI
- Altstack.jp, like European-alternatives.eu, for Japan
- MuJS Running on TempleOS
I made a 3D printed VTOL drone [Consumer Tech]
142 points, 54 comments
A 3D printed VTOL drone capable of 130 miles and 3 hours of flight on a single charge.
- 130-mile range and 3-hour endurance
- Made with foaming PLA and PETG structural parts
- Uses Li-ion silicon anode Amprius SA08 cells
- Equipped with Speedybee F405 Wing flight controller and M10 GPS
- Runs on Ardupilot 4.6.0 firmware
- Built by a beginner in CAD, 3D printing, and aerodynamics
Discussion Link, Original Link
A "Course" as an MCP Server [Education]
73 points, 5 comments
An interactive Mastra developer course delivered via an MCP server, enabling AI-assisted learning through code agents.
- Uses MCP server to dynamically teach course content via coding agents
- Designed to avoid outdated video content by providing real-time guidance
- Works with MCP-supported editors like Cursor, Windsurf, or VSCode
- Encourages learning by instructing agents to teach rather than complete tasks
- Experimental stage with varying model performance; open-source code available
Discussion Link, Original Link
Chili3d – A open-source, browser-based 3D CAD application [Design]
226 points, 61 comments
An open-source, browser-based 3D CAD application with near-native performance for modeling, editing, and rendering.
- Open-source and browser-based, no local installation required
- Compiles OpenCascade to WebAssembly and integrates Three.js
- Supports basic shapes, 2D sketches, and advanced operations like boolean operations
- Precise snapping and tracking for accurate alignment
- Advanced editing tools including chamfer, fillet, and feature removal
- Measurement tools for angles, lengths, and volume calculations
- Document management with undo/redo and support for STEP, IGES, BREP formats
- Office-style UI with contextual commands and assembly management
- Multi-language support (Chinese and English)
MidWord – A Word-Guessing Game [Entertainment]
24 points, 22 comments
MidWord is a word-guessing game.
- Word-guessing gameplay
- Simple and engaging design
Discussion Link, Original Link
High End Color Quantizer [Design]
104 points, 28 comments
A high-end color quantizer project based on an unimplemented research paper, currently in early beta.
- Implements a novel color quantization algorithm from a research paper
- Produces high-quality output despite being in early development
- Currently memory-intensive but functional
- Personal project turned obsession, now shared as beta
Discussion Link, Original Link
PyDoll – Async Python scraping engine with native CAPTCHA bypass [Developer Tools]
110 points, 32 comments
Async Python scraping engine with native CAPTCHA bypass.
- Async Python scraping engine
- Native CAPTCHA bypass capability
Discussion Link, Original Link
I built a loadout building and sharing tool for Helldivers 2 [Entertainment]
11 points, 0 comments
Helldivers 2 loadout building and sharing tool for team compositions.
- Enables players to create and customize loadouts
- Facilitates sharing loadouts with friends
- Designed to fill a gap in the game's current features
Discussion Link, Original Link
A MCP server and client implementing the latest spec [Developer Tools]
70 points, 26 comments
A MCP server and client implementing the latest spec.
- Implements the latest MCP specification
- Includes both server and client components
Discussion Link, Original Link
I am making an app to rival "Everything" [Developer Tools]
15 points, 14 comments
A modern, flexible alternative to "Everything" for fast file search with better system integration and future security features.
- Scans non-NTFS drives, improving compatibility with external/USB drives across different OSes
- Better Windows integration with a modern UI and no admin privileges required
- Planned features: lightning-fast search, local encrypted file sharing, and password-protected file encryption
- Currently slower than "Everything" but aims to match its speed while maintaining flexibility
Discussion Link, Original Link
Viberunner – build personal desktop apps in seconds [Developer Tools]
3 points, 0 comments
Viberunner is a container environment for quickly building macOS apps with simple prompts, eliminating the need for Apple dev accounts and code signing.
- Build macOS apps for one-off use cases and automations
- Run apps in new tabs, windows, or as system menu bar apps
- Supports creating tools like clipboard managers, image redactors, and desktop organizers
- Provides deep system access for maximum control
- Free during alpha, seeking user feedback
Discussion Link, Original Link
macOS app PhotoSort could help reduce your monthly iCloud bill [Image]
4 points, 7 comments
PhotoSort helps macOS users manage iCloud storage by sorting photos by size and quality to identify space hogs and low-quality images.
- Sorts iCloud and Mac Photos library by file size and aesthetic quality
- Creates two albums: SizeSort (large files) and QualitySort (best vs. mediocre photos)
- Free version shows top 30 largest files; paid version ($5) unlocks full sorting and album creation
- Supports multiple languages (English, French, German, Spanish, Russian)
- Reached #54 in Mac App Store's Photos & Videos chart
Zymo.tv [Video]
6 points, 1 comments
A powerful, self-hosted media server that rivals Emby and Plex.
- Self-hosted solution
- Comparable to Emby and Plex
- Media server functionality
Discussion Link, Original Link
Pyleak – Detect asyncio issues causing AI agent latency [Developer Tools]
3 points, 0 comments
Pyleak detects and helps resolve asyncio event loop blocks causing latency in Python-based AI agents.
- Automatically identifies event loop blocks affecting performance
- Integrates as a pytest plugin for easy testing
- Helps diagnose latency issues before blaming external LLM providers
Discussion Link, Original Link
AI-Powered Music Creation Starts Here – Vibe Musicing [Audio]
4 points, 0 comments
AI-powered music creation platform for enthusiasts and professionals to generate high-quality music effortlessly.
- AI-based tool for music generation
- Suitable for both professionals and beginners
- Creates background music and song ideas
- Cutting-edge music AI technology
Discussion Link, Original Link
An AI tutors that teaches AI [Education]
5 points, 1 comments
A platform for creating and sharing voice-based AI tutors tailored to specific learning materials or goals.
- Enables instant creation of conversational AI tutors for personalized learning
- Supports voice interaction to enhance learning through real conversation
- Allows instructors to align tutors with course content and share with students
- Free to use initially, with a focus on accessibility and ease of adoption
- Designed to guide learners to conclusions rather than just providing answers
Discussion Link, Original Link
Altstack.jp, like European-alternatives.eu, for Japan [Business]
4 points, 0 comments
A directory of Japanese alternatives to international tech services, emphasizing compliance with Japan's privacy laws.
- Focuses on Japan-specific alternatives for cloud hosting, VPS, and email providers
- Inspired by european-alternatives.eu but tailored for Japan
- Currently includes four categories and is a work in progress
- Aims to help users navigate Japan's privacy laws (APPI)
Discussion Link, Original Link
MuJS Running on TempleOS [Developer Tools]
6 points, 0 comments
MuJS, a lightweight JavaScript engine, is demonstrated running on TempleOS.
- Runs MuJS on TempleOS
- Demonstrates compatibility with an unconventional OS