Show HN Daily Selection (2025-05-24)
- Genetic Boids Web Simulation
- I built a more productive way to manage AI chats
- DoubleMemory – more efficient local-first read-it-later app
- GetStack.dev – Track GitHub open-source trends
- hcker.news – an ergonomic, timeline-based Hacker News front page
- Samchika – A Java Library for Fast, Multithreaded File Processing
- Doc2dict a fast, open-source document to dict converter – No AI
- Advanced Chunking in JavaScript/TypeScript with Chonkie
- I built a directory for side hustles to help people exit the rat race
- A Model Context Protocol server for NASA APIs
- nwtb - a site for discovering new music on YouTube
- SlimImg – Client-side image compression and EXIF editor (no uploads)
- PolyLia – Learn languages by challenging friends (open beta)
Genetic Boids Web Simulation [Entertainment]
87 points, 25 comments
Genetic Boids Web Simulation is a web-based simulation showcasing genetic algorithms applied to boids (bird-like objects) behavior.
- Web-based simulation
- Uses genetic algorithms
- Models boids (bird-like objects) behavior
Discussion Link, Original Link
I built a more productive way to manage AI chats [Productivity]
42 points, 28 comments
A tool for managing AI chats more productively.
- Enhanced productivity for AI chat management
- Streamlined organization of chat interactions
Discussion Link, Original Link
DoubleMemory – more efficient local-first read-it-later app [Productivity]
77 points, 23 comments
DoubleMemory is a local-first read-it-later app that combines bookmarking, clipboard management, and note-taking with a visually appealing card-based interface.
- Automatically saves double cmd+c copies without browser extensions
- Features a Pinterest-like translucent mood board for preview cards
- Supports keyboard shortcuts and menu bar access
- Includes an iOS app with swipe navigation
- Local-first architecture with no server costs
- Free with no limits, focusing on content retrieval and consumption
- Offers drag-and-drop, Share sheet, and right-click capture options
- Apple-only (macOS, iOS, iPadOS) for lower maintenance costs
- Future plans for paid features aligned with value-generating workflows
Discussion Link, Original Link
GetStack.dev – Track GitHub open-source trends [Developer Tools]
11 points, 4 comments
A tool to track GitHub open-source trends, tech adoption, and repository stacks with weekly updates.
- Monitors GitHub trends and tech adoption
- Provides data-driven insights for tech leaders
- Weekly data refreshes from GitHub
- Built with ClickHouse, transparently documented
- Helps identify hype vs. under-the-radar projects
Discussion Link, Original Link
hcker.news – an ergonomic, timeline-based Hacker News front page [Productivity]
117 points, 53 comments
An ergonomic, timeline-based alternative front page for Hacker News with enhanced browsing and filtering options.
- Timeline View: Browse top stories grouped by day, week, or month.
- Aggregate View: See top stories over custom time ranges.
- Front Page View: Original HN front page preserved.
- Feed Filtering: Includes Kagi Small Web, custom keyword filters, and bypasses HN algorithm downranking.
- UI Enhancements: Unread flags, two layout options, multi-column/high-density modes, and theme choices.
Discussion Link, Original Link
Samchika – A Java Library for Fast, Multithreaded File Processing [Developer Tools]
58 points, 43 comments
A Java library for high-performance, multithreaded file processing with built-in concurrency and metrics.
- Multi-threaded line/batch processing with configurable thread pool
- Producer/consumer model with built-in backpressure
- Buffered, asynchronous writing with optional auto-flush
- Live metrics for memory, throughput, and thread performance
- Simple builder API for minimal setup
- Output metrics to JSON, CSV, or human-readable format
Discussion Link, Original Link
Doc2dict a fast, open-source document to dict converter – No AI [Developer Tools]
3 points, 0 comments
A fast, open-source Python package that converts HTML and PDF documents into hierarchical dictionaries without using AI.
- Converts HTML and PDF documents into structured dictionaries while preserving hierarchy
- Supports table extraction for HTML files
- High-speed processing: 500 HTML pages/second (single-threaded) and 200 PDF pages/second
- Includes visualization tools for debugging simplified representations and output dictionaries
- Modular design with customizable "mapping dicts" for parsing rules
- Reduces document size by ~10x through dictionary conversion
- Developed to support another open-source project (datamule) for SEC data processing
Advanced Chunking in JavaScript/TypeScript with Chonkie [Developer Tools]
6 points, 2 comments
Chonkie is an open-source TypeScript library for advanced text and code chunking to improve AI retrieval performance.
- Supports multiple chunkers: Code, Recursive, Token, and Sentence Chunkers
- Customizable tokenizers, chunk overlap, and delimiters
- Upcoming features: Semantic, SDPM, Late, and Slumber Chunkers
- Embeddings Refinery for embedding models
- Free and MIT-licensed
I built a directory for side hustles to help people exit the rat race [Business]
4 points, 1 comments
Directory for side hustles to help people exit the rat race.
- Lists various side hustle opportunities
- Aims to provide alternative income sources
- Helps users transition from traditional employment
Discussion Link, Original Link
A Model Context Protocol server for NASA APIs [Developer Tools]
3 points, 1 comments
A Model Context Protocol server for NASA APIs.
- Enables interaction with NASA APIs
- Uses Model Context Protocol for standardized communication
Discussion Link, Original Link
nwtb - a site for discovering new music on YouTube [Entertainment]
5 points, 1 comments
Discover new music on YouTube through curated recommendations.
- Curated music recommendations
- Focus on YouTube platform
- Community-driven discovery
Discussion Link, Original Link
SlimImg – Client-side image compression and EXIF editor (no uploads) [Image]
3 points, 2 comments
Client-side tool for image compression and EXIF editing without uploading.
- Compresses images directly in the browser
- Edits EXIF metadata locally
- No server uploads required
Discussion Link, Original Link
PolyLia – Learn languages by challenging friends (open beta) [Education]
3 points, 0 comments
PolyLia is a multiplayer app that gamifies language learning through real-time challenges and friendly competition.
- Turns language learning into engaging real-time duels
- Focuses on competition with friends or strangers instead of solo practice
- Currently in open beta with a Founder's Badge for early users
- Seeks feedback from language learners and educators for improvements