Show HN Daily Selection (2025-06-12)
- Spark, An advanced 3D Gaussian Splatting renderer for Three.js
- Ikuyo a Travel Planning Web Application
- RomM – An open-source, self-hosted ROM manager and player
- S3mini – Tiny and fast S3-compatible client, no-deps, edge-ready
- DIY virtual HDMI monitor using "AR" glasses
- CongressMCP – interact with congress.gov data in natural language
- Rapidez – Headless Magento with Laravel and InstantSearch
- StopX – AI-powered content blocker with 99.7%
- Jomon – a network forensics and passive sniffer tool
- Open-source Go Challenges – Interactive practice for interviews
- I'm building an app to replace Overleaf and Notion
- Building Electret Mic Preamp Open sourced
- InstaAmp – Supercharge Instagram Web
Spark, An advanced 3D Gaussian Splatting renderer for Three.js [Developer Tools]
201 points, 43 comments
Spark is an open-source 3D Gaussian Splatting renderer for Three.js, designed for easy integration into 3D scenes.
- Advanced 3D Gaussian Splatting rendering
- Seamless integration with Three.js
- Open-source and community-driven
- Developed by experienced Web 3D graphics developers
- Focus on modern 3D representation techniques
Discussion Link, Original Link
Ikuyo a Travel Planning Web Application [Travel]
223 points, 75 comments
A travel planning web application with timetable, map, and expense tracking features.
- Timetable view for activities, accommodations, and day plans
- List and map views for trip components
- Commenting functionality for trip planning
- Integrated expense tracker
- Sharing and collaboration with friends
- Open-source and available on GitHub
Discussion Link, Original Link
RomM – An open-source, self-hosted ROM manager and player [Entertainment]
169 points, 63 comments
RomM is a self-hosted ROM manager and player that organizes retro game libraries with metadata and enables browser-based gameplay.
- Automatically fetches metadata, artwork, and game info from online sources
- Supports in-browser emulation for consoles like N64, GBA, and PS1
- Integrates with Playnite, muOS, and Steam Deck via community plugins
- Open-source (AGPLv3) project developed by a small team over two years
- Demo available for testing on a low-cost VPS
Discussion Link, Original Link
S3mini – Tiny and fast S3-compatible client, no-deps, edge-ready [Developer Tools]
210 points, 89 comments
Tiny and fast S3-compatible client with no dependencies, optimized for edge environments.
- S3-compatible
- No dependencies
- Edge-ready
- Fast performance
- Minimalist design
Discussion Link, Original Link
DIY virtual HDMI monitor using "AR" glasses [Consumer Tech]
85 points, 64 comments
A DIY virtual HDMI monitor using Viture Pro XR glasses and an SBC to create a low-cost, head-tracked virtual display.
- Uses Viture Pro XR glasses and an OrangePi 5 Plus with HDMI-in
- Maps HDMI frames to a virtual display controlled by 3DOF IMU tracking
- Reverse-engineered protocol due to lack of official ARM SDK support
- Aims for comfort and affordability compared to headsets like Meta Quest or Vision Pro
- Performance currently unoptimized, with room for improvement
Discussion Link, Original Link
CongressMCP – interact with congress.gov data in natural language [Business]
3 points, 0 comments
CongressMCP is an open-source MCP server that enables natural language interaction with Congress.gov data for AI agents and clients.
- Provides access to Congress.gov API via 6 consolidated legislative toolsets
- Supports natural language queries for bills, amendments, votes, committees, and members
- Self-hostable or available as a free hosted service via NPM bridge
- Designed as AI-native infrastructure for government affairs teams
Discussion Link, Original Link
Rapidez – Headless Magento with Laravel and InstantSearch [E-commerce]
8 points, 0 comments
Rapidez is a headless Magento solution built with Laravel and InstantSearch for fast, modern e-commerce experiences.
- Integrates Magento with Laravel for improved performance and developer experience
- Uses Elasticsearch/OpenSearch with InstantSearch for fast filtering and searching
- Supports GraphQL for cart and checkout functionality
- Features renderless Vue components with Blade templates
- Free and open-source with extensive documentation and live demos
Discussion Link, Original Link
StopX – AI-powered content blocker with 99.7% [Consumer Tech]
6 points, 3 comments
StopX is an AI-powered content blocker with 99.7% accuracy, using real-time analysis and cross-device synchronization.
- Proprietary WebShield™ technology for real-time AI image recognition
- Contextual URL pattern matching beyond domain blocking
- Cross-device sync with encrypted settings
- Military-grade bypass protection and stealth mode
- Lightweight edge model for sub-100ms response times
- Supports Chrome, Firefox, iOS, Android, Windows, and Mac
- Processes over 50M requests with 250K+ active users
Discussion Link, Original Link
Jomon – a network forensics and passive sniffer tool [Developer Tools]
3 points, 0 comments
Jomon is a network forensics and passive sniffer tool.
- Designed for network forensics
- Functions as a passive sniffer
- Analyzes network traffic
- Supports security investigations
Discussion Link, Original Link
Open-source Go Challenges – Interactive practice for interviews [Education]
3 points, 0 comments
An open-source GitHub repo offering 30 interactive Go challenges for interview preparation with automated testing and instant feedback.
- Structured learning with challenges covering concurrency, interfaces, and goroutines
- Web-based interface for running code and receiving instant test results
- Performance tracking and leaderboard for competitive practice
- Easy setup with GitHub integration and auto-judging via GitHub Actions
- Includes learning materials and documentation for each challenge
Discussion Link, Original Link
I'm building an app to replace Overleaf and Notion [Text]
4 points, 2 comments
A modern writing platform for complex documents, combining LaTeX-like features with collaboration and organization tools.
- Custom block editor optimized for large documents
- Supports Markdown blocks for plain-text writing
- Built-in citation management and cross-references
- Mermaid diagrams, LaTeX equations, and display math support
- To-do sections for organization
- Real-time collaboration and university template integration
Building Electret Mic Preamp Open sourced [Audio]
5 points, 2 comments
An open-source studio-quality electret microphone preamp designed for low noise, high gain, and clean audio capture.
- Original design not based on common application schematics
- Tested and verified in LTspice before building
- Includes schematics, design rationale, and build instructions
- Demo available showcasing audio performance
- Over a month of research and testing invested
Discussion Link, Original Link
InstaAmp – Supercharge Instagram Web [Consumer Tech]
3 points, 0 comments
A Chrome extension that enhances Instagram's web version with additional features.
- Background reel playback
- Reel speed control
- Auto-scroll reels