Show HN Daily Selection (2025-07-05)
- AirBending – hand gesture based macOS app MIDI controller
- I AI-coded a tower defense game and documented the whole process
- BunkerWeb – the open-source and cloud-native WAF
- Fast Thermodynamic Calculations in Python
- Built a lovable clone to see what makes agentic apps tick
- I Built a Pocket OS with JavaScript, Electron, and Gemini
- I built sinkedin – a LinkedIn but for flauting failures and screwups
- Kuvasz – an open-source uptime and SSL monitoring service
- Hands on tutorial for open source contribution
- A stupid simple barely S3 compatible file server
- Dhansishtha-2.0-preview – First Intermediate Reasoning model
AirBending – hand gesture based macOS app MIDI controller [Consumer Tech]
35 points, 11 comments
AirBending is a macOS app that allows users to control MIDI through hand gestures.
- Hand gesture-based MIDI control
- Designed for macOS
- No physical controller required
Discussion Link, Original Link
I AI-coded a tower defense game and documented the whole process [Entertainment]
189 points, 115 comments
A developer created a tower defense game using AI coding assistance and documented the entire process.
- Built with Phaser.js and AI coding agents
- Submitted to Beginner’s Jam Summer 2025 with a "Time Travel" theme
- Open-sourced code and prompts on GitHub
- Uses free art assets and sound effects
- Streamed development process on Twitch
Discussion Link, Original Link
BunkerWeb – the open-source and cloud-native WAF [Developer Tools]
82 points, 28 comments
BunkerWeb is an open-source, cloud-native web application firewall (WAF).
- Open-source
- Cloud-native
- Web application firewall (WAF)
Discussion Link, Original Link
Fast Thermodynamic Calculations in Python [Developer Tools]
47 points, 8 comments
A lightweight Python library for fast thermodynamic calculations with a large species database and GPU compatibility.
- Written in typed Python/Numpy for performance
- Supports multidimensional arrays for composition, temperature, and pressure
- Designed for easy use in Jupyter Notebooks with compact syntax
- Portable to GPU frameworks like JAX or PyTorch for ML integration
- Includes a large species database for equilibrium reactions
Discussion Link, Original Link
Built a lovable clone to see what makes agentic apps tick [Developer Tools]
3 points, 1 comments
A lovable clone project exploring the mechanics of agentic applications.
- Explores the inner workings of agentic apps
- Designed as a clone for learning purposes
- Focuses on understanding key functionalities
Discussion Link, Original Link
I Built a Pocket OS with JavaScript, Electron, and Gemini [Consumer Tech]
4 points, 0 comments
Pocket Oopis-OS 3.6 is a portable, self-contained OS built with JavaScript and Electron, enabling users to carry their entire digital environment without installation or traces.
- No installation required
- Leaves no trace on host machines
- Fully self-contained with files, settings, and history
- Built with JavaScript and Electron
- Supports Gemini protocol
Discussion Link, Original Link
I built sinkedin – a LinkedIn but for flauting failures and screwups [Business]
24 points, 6 comments
A platform for sharing career failures and screwups anonymously.
- Anonymous posting of job rejections, interview mistakes, and career failures
- Minimalistic UI built quickly to test the concept
- Runs entirely on free-tier infrastructure
- Open-source with contributions welcome via GitHub PRs
Discussion Link, Original Link
Kuvasz – an open-source uptime and SSL monitoring service [Developer Tools]
10 points, 0 comments
Kuvasz is an open-source uptime and SSL monitoring service with a modern UI and multiple notification options.
- Configurable uptime and SSL monitoring
- Supports Telegram, Slack, PagerDuty, and email notifications
- Fully-fledged REST API
- Responsive, modern UI
- Monitors configurable via YAML, UI, or API
- Cloud-native with amd64 and arm64 support
- Minimal dependency (PostgreSQL only)
- Stable memory usage (~360MB max) and high performance
- Built with Kotlin, Micronaut, Netty, jOOQ, and PostgreSQL
- Server-side rendered UI using kotlinx.html, Alpine.js, and htmx
Discussion Link, Original Link
Hands on tutorial for open source contribution [Education]
4 points, 0 comments
Open-source contribution tutorial for hands-on learning.
- Practical guide for contributing to open-source projects
- Step-by-step tutorial format
- Focused on hands-on experience
Discussion Link, Original Link
A stupid simple barely S3 compatible file server [Developer Tools]
3 points, 2 comments
A simple, minimal S3-compatible file server.
- Stupid simple design
- Barely S3 compatible
- Lightweight file server
Discussion Link, Original Link
Dhansishtha-2.0-preview – First Intermediate Reasoning model [Developer Tools]
4 points, 0 comments
Dhanishtha-2.0 is a fast and efficient intermediate reasoning model optimized for complex tasks like math, coding, and logic puzzles.
- 5x faster reasoning than models like DeepSeek-R1, Grok, and OpenChat
- Lower token usage and latency, ideal for startups and real-time applications
- Solves benchmark-level math and logic problems in seconds
- Open-source model weights available on Hugging Face
- Chat/API access provided via HelpingAI's platform