🛠️ All DevTools

[Other] Show HN: Loopletter: Open-source email marketing platform Hi, I started building Loopletter, an open-source email marketing platform built specifically for independent artists and creators. I&#x27;ve been using this for a while to run marketing campaigns for my own company. But due to the lack of time to update it i&#x27;ve decided to open it up under the MIT license so other people and industries can self-host, extend, or just learn from the codebase.<p><pre><code> What’s inside: - Full campaign builder (visual editor, reusable templates, optional Spotify-powered layouts) - Audience management tooling (imports, segmentation, consent workflows, list cleanup) - Queue-driven sending with AWS SES, BullMQ, and Redis — handles rate limits, retries, and deliverability feedback - Analytics dashboards with real-time metrics, campaign history, and basic attribution - Infrastructure scripts for Supabase, AWS EventBridge&#x2F;Lambda, and Upstash Redis so you can set everything up from scratch Tech stack: Next.js, React 19, TypeScript, Tailwind, Clerk for auth, Supabase (Postgres) for storage, AWS SES + S3 for mail&#x2F;asset delivery. The repo has docs, scripts, and a demo data sandbox because we know email platforms can be boring to set up without real content. Why open-source? Most tools in this space are either huge enterprise SaaS products or very marketing&#x2F;sales oriented. Independent artists have different needs (merch drops, tour announcements, limited release windows) and usually lean on social platforms they don’t control. Email still converts best for them, but standing up a full stack is painful. We’d love to see small labels, agencies, and indie devs fork it, run it for their communities, or contribute features. I&#x27;m especially curious if this has potential to be something bigger. Repo link: https:&#x2F;&#x2F;github.com&#x2F;createdbymax&#x2F;Loopletter-Open-source-email-marketing-platform Production website: https:&#x2F;&#x2F;loopletter.co&#x2F; Happy to answer questions about the project, SES deliverability, or anything else related to running email at indie scale. Thanks for taking a look!</code></pre>

[Other] Debug like a boss: 10 debugging hacks for developers, quality engineers, testers

[Other] Show HN: I build a cheap Skype Clone I build a skype clone, where you can make international calls via browser.<p>Skype was my go to app for that, but since they shut it down, decided to build my own. Its perfect for calling international customer support, or any other gov numbers.<p>Its pay-as-you-go - so no subscription charges, very transparent pricing. You can just top up $5 and see pricing in real time during the call.

[Other] Git CLI tool for intelligently creating branch names

[Other] Perfetto: Swiss army knife for Linux client tracing

[Other] DynGen – Run dynamic scripts on a SuperCollider server

[Other] Got rejected by Xcode Team. I made iOS AI Code Agent Snailer - iOS AI Copilot Agent for enhanced productivity - AI Code Agent - Figma MCP Designer ‘/figma implement this figma design” - Memory Visualizer and Time/Space Complexity - iOS build and test

[Monitoring/Observability] Domain Health and Security Introducing SecurityLens: Your Domain's Security Guardian. Every business with an online presence faces invisible threats that traditional monitoring tools miss. SecurityLens is a next-generation domain security platform that protects your digital identity by detecting vulnerabilities before attackers exploit them.

[Other] AI-Automated-Trading-Framework Combine a large language model API and an exchange API. The system periodically retrieves exchange data, sends it to the AI, and uses tailored prompts so the AI outputs commands in a format recognized by the exchange API—enabling fully automated trading. - a985783/AI-Automated-Trading-Framework

[Other] ai-sdk-panel: the config panel for ai sdk. The LLM Providers editor for ai sdk providers. Many AI applications require editing and managing Providers, and doing this well takes considerable effort. Having built several AI applications, I found myself constantly reinventing the wheel, developing a separate LLM provider editor for each one. The project includes complete end-to-end (e2e) testing, built and tested using the latest Vitest 4.0 Browser Mode.

[Other] Generate precise construction estimates. Harness quantum-speed AI to generate precise construction estimates in seconds. Quote Forge empowers modern contractors with smart cost breakdowns, real-time data, and effortless bidding — built to save hours and maximize profit.

[Other] A minimal, adapter-driven CRUD layer for NestJS Drop-in NestJS module for instant, robust CRUD API generation—just point it at your entities. Flexible, fast, model-driven. Adapters and overrides for full control. Coming soon to more languages and libraries

[Other] The 3-Click SFTP, FTPS & FTP Server for Windows 10/11 Tired of complex configs just to set up an FTP/FTPS/SFTP server on Windows? ServeSense lets you launch a secure SFTP, FTPS, or FTP server in literally 3 clicks. Built for simplicity and security, it features brute-force protection, IP filtering, and auto-start

[Other] Interactive, Composable Charting Library for React Build composable, interactive and performant charts with React. Open-source library featuring customizable chart components.

[Testing] Test your IPv6 readiness instantly in your browser The fastest browser-based IPv6 connectivity test available. Six comprehensive tests complete in under 15 seconds by running all checks in parallel. The moment you open the page, it simultaneously tests IPv4-only endpoints, IPv6-only endpoints, dual-stack compatibility, latency, and protocol preferences. Everything runs client-side with zero backend latency. No server round-trips, no queuing, no waiting. Written in vanilla JavaScript with no framework overhead

[API/SDK] Open-source UI kit for ChatGPT Apps SDK AINativeKit-UI bridges the gap between MCP JSON outputs and polished ChatGPT App UIs. Instantly render structured results as cards, lists, maps, and more. No manual UI coding. Built for the ChatGPT Apps SDK with mobile-ready layouts, dark mode, Figma-aligned design, open source and TypeScript support. 🎪 Live Storybook: https://ainativekit.com 🧩 GitHub: https://github.com/AINativeKit/ainativekit-ui

[Other] Chrome Extension Launch PDF to Text is a simple yet powerful Chrome extension that lets you instantly convert PDFs into editable text. Extract text from scanned files using AI, copy it with one click, or download it intxt format, read the text aloud and save your extraction history.

[Other] Your tool to help remind clients about overdue invoices InvoiceRem helps you manage invoices and automatically remind clients about overdue payments with smart tracking

[Other] Show HN: IRCd in Pure Bash In <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=45755788">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=45755788</a> there was mention of an IRC server using gawk, but no code. So I wrote an IRCd in pure bash.

[Other] Show HN: Ellipticc Drive – open-source cloud drive with E2E and PQ encryption Hey HN, I’m Ilias, 19, from Paris.<p>I built Ellipticc Drive, an open-source cloud drive with true end-to-end encryption and post-quantum security, designed to be Dropbox-like in UX but with zero access to your data, even by the host.<p>What’s unique:<p>Free 10GB for every user, forever.<p>Open-source frontend (audit or self-host if you want)<p>Tech stack:<p>Frontend: Next.js<p>Crypto: WebCrypto (hashing) + Noble (core primitives)<p>Encryption: XChaCha20-Poly1305 (file chunks)<p>Key wrapping: Kyber (ML-KEM768)<p>Signing: Ed25519 + Dilithium2 (ML-DSA65)<p>Key derivation: Argon2id → Master Key → encrypts all keypairs &amp; CEKs<p>Try it live: <a href="https:&#x2F;&#x2F;ellipticc.com" rel="nofollow">https:&#x2F;&#x2F;ellipticc.com</a><p>Frontend source: <a href="https:&#x2F;&#x2F;github.com&#x2F;ellipticc&#x2F;drive-frontend" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;ellipticc&#x2F;drive-frontend</a><p>Would love feedback from devs and security folks — particularly on encryption flow, architecture, or UX.<p>I’ll be around to answer every technical question in the comments!