Show HN Daily Selection (2025-06-03)
- I build one absurd web project every month
- Kan.bn – An open-source alterative to Trello
- A toy version of Wireshark (student project)
- Penny-1.7B Irish Penny Journal style transfer
- I made an AI that turn live lecture into structured notes,mind-maps,PDF
- MBCompass – Android Compass App
- Text undo that doesn't lose your edit history
- Fast Random Library for C++17
- GoogLLM – Google search that returns Markdown instead of HTML
- I built an AI Agent that uses the iPhone
- FLOX – C++ framework for building trading systems
- I created a free invoice generator tool. Generate pdf in realtime
- Agno – A full-stack framework for building Multi-Agent Systems
- An Interactive Debugger MCP Server
- We built a tool that makes Cursor as easy to use as V0 or Loveable
- MCPglue (Open Source) – Let your agent build its own tools
- I am building the best spot cryptocurrency screener
- System Prompt Learning – LLMs Learn Problem-Solving from Experience
- A free tool to visualize & plan your life timeline
- Teacher Mode – Turn AI Notebooks into Interactive Coding Quizzes
- Minotor – An open-source public transit routing library
- Open-Source Terminal/SSH Automation Framework for AI Agents and LLMs
- A small library for stack-trace-like error messages in Rust
- LMStudio Client in Elixir
I build one absurd web project every month [Entertainment]
85 points, 24 comments
A monthly collection of absurd, mostly useless web projects that explore the unconventional and humorous side of the internet.
- Features deliberately non-functional, weird, or philosophical web projects
- Examples include "Sexy Math," "Trip to Mars," and "Artist Death Tracker"
- Encourages creative, unconventional ideas beyond traditional utility
- New project published every month at absurd.website
Discussion Link, Original Link
Kan.bn – An open-source alterative to Trello [Productivity]
330 points, 139 comments
Open-source alternative to Trello.
- Open-source
- Trello-like functionality
Discussion Link, Original Link
A toy version of Wireshark (student project) [Developer Tools]
185 points, 57 comments
A minimal network packet analyzer written in Go, designed as a learning tool rather than a Wireshark replacement.
- Parses basic protocols like TLS, DNS, and HTTP
- Includes a tiny fuzzing engine for payload testing
- Terminal-based inspection with colored output for readability
- Simple and clear code structure (~400 lines of Go)
- Open-source and available on GitHub
Discussion Link, Original Link
Penny-1.7B Irish Penny Journal style transfer [Text]
122 points, 69 comments
A language model trained to mimic the Irish Penny Journal's archaic writing style using synthetic data and a small encoder.
- Trained with GRPO in under a day on a single A6000
- Uses MiniLM2 encoder to classify Irish Penny Journal texts and synthetic modern translations
- No supervised fine-tuning (SFT) applied
- Generates nostalgic, archaic-style text reminiscent of the 19th-century Irish Penny Journal
Discussion Link, Original Link
I made an AI that turn live lecture into structured notes,mind-maps,PDF [Education]
13 points, 5 comments
Notorium is an AI-powered tool that transforms live lectures into structured notes, mind maps, and flowcharts for students.
- Records and transcribes lectures in real-time using Whisper
- Generates summaries, topics, and visual aids (flowcharts, mind maps) via LLM
- Offers downloadable PDFs and adjustable note complexity (Simplify/Expand)
- Organizes notes by subject tags for easy retrieval
- Designed for in-person and visual learners
- Plans to add spaced-repetition flashcards
- Built with Next.js, Tailwind, Firebase, and Groq for fast processing
Discussion Link, Original Link
MBCompass – Android Compass App [Consumer Tech]
58 points, 34 comments
A lightweight, privacy-focused Android compass app that works offline and is open-source.
- Fully offline functionality with no GPS or internet permissions
- Open-source and privacy-friendly
- Small size (~1.7MB) and optimized sensor readings with a low-pass filter
- Clean, fast, and ad-free design
Discussion Link, Original Link
Text undo that doesn't lose your edit history [Text]
8 points, 1 comments
Text undo feature that preserves edit history.
- Preserves full edit history
- Allows undoing changes without losing previous edits
Discussion Link, Original Link
Fast Random Library for C++17 [Developer Tools]
51 points, 52 comments
A high-performance C++17 random number generation library offering faster and more reliable alternatives to standard implementations.
- 3x-6x faster PRNGs with better statistical quality
- Includes cryptographically secure generators (CSPRNGs)
- Platform-independent uniform/normal distributions
- Quick approximations for non-linear distributions
- Improved entropy sources over
std::random_device - Simplified
rand()-like API for convenience
Discussion Link, Original Link
GoogLLM – Google search that returns Markdown instead of HTML [Developer Tools]
5 points, 0 comments
GoogLLM is a proxy service that converts Google search results into clean Markdown for easier consumption by LLMs and scripts.
- Converts Google search results from HTML to Markdown
- Supports all Google search types (web, images, news, etc.)
- Uses content negotiation to serve HTML to browsers and Markdown to scripts
- Free tier allows 10 requests/hour, then $0.005 per search
- No authentication required for testing
- Caches results to avoid excessive requests to Google
Discussion Link, Original Link
I built an AI Agent that uses the iPhone [Consumer Tech]
44 points, 13 comments
AI-powered iPhone automation agent using GPT-4.1 and Xcode UI tests.
- Powered by OpenAI’s GPT-4.1 model
- Uses Xcode UI tests and accessibility tree for app interaction
- Performs swipes, taps, and other actions to automate tasks
Discussion Link, Original Link
FLOX – C++ framework for building trading systems [Finance]
7 points, 0 comments
FLOX is a modular C++20 framework for building high-frequency trading systems, market data feeds, and trading infrastructure.
- Built in pure C++ with C++20 features
- Modular design for HFT systems, trading infrastructure, and market data feeds
- Open-source with tests and benchmarks for stability
- Potential future support for JavaScript engine for strategy scripting
- Documentation and GitHub repository available for contributions
Discussion Link, Original Link
I created a free invoice generator tool. Generate pdf in realtime [Business]
3 points, 0 comments
Free online tool for generating PDF invoices in real-time.
- Generates invoices instantly
- No cost to use
- Outputs professional PDF format
Discussion Link, Original Link
Agno – A full-stack framework for building Multi-Agent Systems [Developer Tools]
67 points, 19 comments
Agno is a full-stack framework designed for building multi-agent systems.
- Full-stack solution for multi-agent development
- Supports scalable agent-based architectures
- Simplifies complex system integration
Discussion Link, Original Link
An Interactive Debugger MCP Server [Developer Tools]
5 points, 0 comments
Interactive Debugger MCP Server for debugging applications.
- Interactive debugging capabilities
- MCP (Multi-Connection Protocol) server support
- Designed for application debugging
Discussion Link, Original Link
We built a tool that makes Cursor as easy to use as V0 or Loveable [Developer Tools]
3 points, 0 comments
A tool that simplifies using Cursor to be as easy as V0 or Loveable.
- Simplifies Cursor usage
- Comparable to V0 or Loveable in ease of use
Discussion Link, Original Link
MCPglue (Open Source) – Let your agent build its own tools [Developer Tools]
3 points, 1 comments
An open-source tool that enables agents to dynamically build their own tools by integrating APIs and chaining endpoints for reliable workflows.
- Lets agents create custom tools on-demand by reading API documentation
- Abstracts API calls and data mappings for seamless integration
- Supports cross-API workflows (e.g., Stripe to HubSpot)
- Self-healing capability adapts to API or input changes
- Provides a quickstart guide and GitHub repository for easy adoption
Discussion Link, Original Link
I am building the best spot cryptocurrency screener [Finance]
3 points, 0 comments
A cryptocurrency screener for 400+ spot cryptocurrencies with plans to scale to 10K+ by integrating top exchanges.
- Server-side filtering/sorting to handle massive datasets
- Flexible multi-condition screening with AND/OR operators
- Technical indicator calculations (RSI, moving averages, performance metrics)
- Search history persistence
- Built with F# backend and TypeScript/Angular frontend
- Part of a larger no-code backtesting platform
Discussion Link, Original Link
System Prompt Learning – LLMs Learn Problem-Solving from Experience [Developer Tools]
44 points, 12 comments
A system that enables LLMs to learn and refine problem-solving strategies dynamically, improving performance over time through transparent, human-readable JSON-based strategies.
- Automatically builds and refines strategies for different problem types
- Stores strategies as editable, human-readable JSON
- Improves benchmark performance (e.g., 8.6% on Arena Hard)
- Works with OpenAI-compatible APIs via an open-source plugin
- Offers inference-only and learning modes
- Transparent strategy tracking without black-box learning
A free tool to visualize & plan your life timeline [Life Assistant]
4 points, 1 comments
A free visual tool for planning and balancing all aspects of life using a color-coded grid system.
- Provides a complete view of life domains (work, health, relationships, etc.)
- Visual grid system for clear time allocation and balance tracking
- Color-coded design highlights imbalances in life priorities
- Incorporates behavioral science for lasting habit formation
- Avoids complexity of traditional productivity tools
Discussion Link, Original Link
Teacher Mode – Turn AI Notebooks into Interactive Coding Quizzes [Education]
3 points, 0 comments
A desktop app that turns AI notebooks into interactive coding quizzes with a "teacher mode" for educational use.
- Converts Python notebooks into quizzes by hiding parts of the code and prompting users to fill in the blanks.
- Provides multiple-choice answers (A, B, C) with only one correct option.
- Automatically inserts and runs the full code upon selecting the right answer.
- Includes built-in Python, Jupyter Lab, and AI-powered data analysis extensions.
- Designed for educators and students to enhance interactive learning.
Discussion Link, Original Link
Minotor – An open-source public transit routing library [Developer Tools]
5 points, 0 comments
Minotor is an open-source client-side transit routing library for the web that enables fast local queries using in-memory GTFS data.
- Supports extended GTFS feed parsing
- Handles complex routing queries
- Provides geographic and textual stop search
- Stores full-day transit data in client memory for fast queries
Discussion Link, Original Link
Open-Source Terminal/SSH Automation Framework for AI Agents and LLMs [Developer Tools]
3 points, 0 comments
Open-source framework for automating terminal and SSH tasks using AI agents and LLMs.
- Designed for terminal and SSH automation
- Supports AI agents and LLMs
- Open-source and customizable
Discussion Link, Original Link
A small library for stack-trace-like error messages in Rust [Developer Tools]
3 points, 0 comments
A small Rust library for generating stack-trace-like error messages.
- Provides stack-trace-like error messages
- Designed for Rust applications
- Lightweight and easy to integrate
Discussion Link, Original Link
LMStudio Client in Elixir [Developer Tools]
5 points, 0 comments
LMStudio Client implemented in Elixir.
- Built using the Elixir programming language
- Provides a client interface for LMStudio