Show HN Daily Selection (2025-05-04)
- Free, in-browser PDF editor
- Use Third Party LLM API in JetBrains AI Assistant
- Pipask – safer pip without compromising convenience
- Live Air Quality Monitor
- Open-lmake, a scalable, reliable build system with auto dep-tracking
- Comp AI – An open source alternative to Drata and Vanta
- A simple Golang CP/M emulator that can run Zork
- I built a web app that creates 3D holographic trading cards
- ColCur – Live-Priced, Stock-Like Trading for Physical Coins
- Bemol, a free and open-source functional ear training app
- I made a gamified card collector to celebrate personal achievement(App)
- InkTodos – calm, distraction free todo list for Kindle
- I created a Sheet AI assistant
Free, in-browser PDF editor [Productivity]
276 points, 72 comments
Free, in-browser PDF editor with no sign-up required.
- Add text, input boxes, and pictures
- Delete pages and merge PDFs
- Password protect PDFs
- 100% free and works entirely in the browser
Discussion Link, Original Link
Use Third Party LLM API in JetBrains AI Assistant [Developer Tools]
80 points, 31 comments
Use Third Party LLM API in JetBrains AI Assistant.
- Integrates third-party LLM APIs into JetBrains AI Assistant
- Enhances functionality with external AI services
- No additional details provided in the post
Discussion Link, Original Link
Pipask – safer pip without compromising convenience [Developer Tools]
44 points, 30 comments
Pipask is a secure drop-in replacement for pip that prevents arbitrary code execution during dependency resolution by verifying package safety before installation.
- Retrieves metadata via PyPI's JSON API to avoid unsafe code execution
- Checks package popularity, download counts, age, and known vulnerabilities
- Provides a detailed report and requires user consent before installation
- Maintains pip's convenience while enhancing security
Discussion Link, Original Link
Live Air Quality Monitor [Health]
8 points, 1 comments
A comprehensive indoor air quality monitoring system built with ESP32-C3 Super Mini and multiple environmental sensors.
- Monitors CO2, temperature, humidity, VOCs, NOx, and particulate matter (PM1.0, PM2.5, PM10)
- Built with ESP32-C3 Super Mini for efficient performance
- Helps maintain healthy air quality in homes or offices
Discussion Link, Original Link
Open-lmake, a scalable, reliable build system with auto dep-tracking [Developer Tools]
4 points, 0 comments
Open-lmake is a scalable, reliable build system with automatic dependency tracking, designed for large projects and HPC environments.
- Automatically tracks dependencies by monitoring disk activity
- Highly reliable, tracking modifications in sources, included files, and rule recipes
- Implements early cut-off using checksums instead of dates
- Fully traceable with dependency DAG navigation and decision explanations
- Lightweight and efficient
- Configuration (Makefile) written in Python with regex-based rules
- Supports complex use cases like EDA tools
Discussion Link, Original Link
Comp AI – An open source alternative to Drata and Vanta [Business]
3 points, 0 comments
An open-source compliance platform alternative to Drata and Vanta, helping companies achieve SOC 2, ISO 27001, and GDPR compliance.
- Open-source alternative to commercial compliance tools
- Supports frameworks like SOC 2, ISO 27001, and GDPR
- Designed for self-service use by founders
- Goal to assist 100,000 companies in five years
Discussion Link, Original Link
A simple Golang CP/M emulator that can run Zork [Developer Tools]
3 points, 0 comments
A simple Golang CP/M emulator capable of running Zork.
- Written in Golang
- Emulates CP/M
- Can run Zork
Discussion Link, Original Link
I built a web app that creates 3D holographic trading cards [Design]
3 points, 0 comments
A web app for creating customizable 3D holographic trading cards with export functionality.
- Built with threejs and vanilla JS
- Edit image/text on the card
- Rotate and adjust holographic intensity
- Export as an image
Discussion Link, Original Link
ColCur – Live-Priced, Stock-Like Trading for Physical Coins [Finance]
5 points, 3 comments
ColCur enables stock-like trading of physical graded U.S. coins with live pricing and transparency.
- Live-priced trading for 200+ graded coins with ticker symbols
- Real-time bids, asks, and population data in a dashboard
- Self-custody—no vaults or custodians required
Discussion Link, Original Link
Bemol, a free and open-source functional ear training app [Education]
3 points, 0 comments
Bemol is a free, open-source mobile app for functional ear training, designed to help musicians develop relative pitch through a minimalist and ad-free experience.
- Free and open-source, no ads or subscriptions
- Uses a I-IV-V-I cadence to establish tonal context
- Helps users identify and internalize notes through repetition
- Currently in public beta via TestFlight for feedback and polishing
- Designed for musicians of all levels (hobbyists to professionals)
Discussion Link, Original Link
I made a gamified card collector to celebrate personal achievement(App) [Entertainment]
3 points, 1 comments
A gamified card collector app to celebrate personal achievements, from fun activities to major life events.
- Tracks achievements like "Sleep for 12 hours" and "Geocaching"
- Includes serious milestones like "Becoming a parent" and "First Job"
- Designed for card game lovers to collect and review achievements
- Available on the App Store
Discussion Link, Original Link
InkTodos – calm, distraction free todo list for Kindle [Productivity]
5 points, 0 comments
A distraction-free todo list optimized for e-ink readers like Kindle and Kobo.
- No login walls or cloud sync
- Simple checklist design
- Optimized for e-ink displays
- Focuses on minimalism and productivity
Discussion Link, Original Link
I created a Sheet AI assistant [Productivity]
4 points, 0 comments
AI assistant for Google Sheets to automate data manipulation and visualization.
- Automates data manipulation in Google Sheets
- Creates tables and charts quickly
- Designed to save time for users
- Open to user feedback for improvements