Show HN: Sonar – A tiny CLI to see and kill whatever's running on localhost https://ift.tt/IyjeS6Y

Show HN: Sonar – A tiny CLI to see and kill whatever's running on localhost https://ift.tt/hEo02Bf March 20, 2026 at 06:59AM

Show HN: Cybertt – Cybersecurity Tabletop https://ift.tt/vGp9L3A

Show HN: Cybertt – Cybersecurity Tabletop https://cybertt.xyz/ March 20, 2026 at 06:29AM

Show HN: Download entire/partial Substack to ePub for offline reading https://ift.tt/Bjcr0m3

Show HN: Download entire/partial Substack to ePub for offline reading Hi HN, This is a small python app with optional webUI. It is intended to be run locally. It can be run with Docker (cookie autodetection will not work). It allows you to download a single substack, either entirely or partially, and saves the output to an epub file, which can be easily transferred to Kindle or other reading devices. This is admittedly a "vibe coded" app made with Claude Code and a few hours of iterating, but I've already found it very useful for myself. It supports both free and paywalled posts (if you are a paid subscriber to that creator). You can order the entries in the epub by popularity, newest first, or oldest first, and also limit to a specific number of entries, if you don't want all of them. You can either provide your substack.sid cookie manually, or you can have it be autodetected from most browsers/operating systems. https://ift.tt/XYLOufc March 20, 2026 at 12:36AM

Show HN: Ripl – A unified 2D/3D engine for Canvas, SVG, WebGPU, and the Terminal https://ift.tt/1Dqd9rn

Show HN: Ripl – A unified 2D/3D engine for Canvas, SVG, WebGPU, and the Terminal After several years, with a small hiatus in the middle, I've finally got Ripl to the point of being published. Ripl is a library for rendering 2D and 3D shapes to any context (canvas, SVG, WebGPU, and Terminal supported by default) using a single API. The library mimics the DOM as much as possible, replicating the event system, object graphing, CSS-like querying, gradients, and keyframe animations etc. I also built a complete data visualization library using the core package which is available as @ripl/charts. And yes, you can even render the charts to a terminal with about a 2-3 line code change :) (see the terminal demo) Docs are available here: https://www.ripl.rocks Demos are available here: https://ift.tt/q1VKpW7 Charts are avialable here: https://ift.tt/Q21zhHV I've also built an interactive playground you can use to play around with it in realtime without having to install it from NPM etc. The playground is available here: https://ift.tt/mbXhCqZ The core library is quite stable and I'll likely publish v1 in the coming weeks. The charts, 3D, and Terminal packages are still very experiemental. I'd interested to hear what you all think of it. https://www.ripl.rocks March 19, 2026 at 08:28AM

Show HN: Jninty – Track seeds, plants, and harvests across seasons (open source) https://ift.tt/7oBJfsG

Show HN: Jninty – Track seeds, plants, and harvests across seasons (open source) https://ift.tt/bSzYGnM March 19, 2026 at 12:38AM

Show HN: Browser grand strategy game for hundreds of players on huge maps https://ift.tt/huWL4ts

Show HN: Browser grand strategy game for hundreds of players on huge maps Hi HN, I've been building a browser-based multiplayer strategy game called Borderhold. Matches run on large maps designed for hundreds of players. Players expand territory, attack neighbors, and adapt as borders shift across the map. You can put buildings down, build ships, and launch nukes. The main thing I wanted to explore was scale: most strategy games are small matches, modest maps, or modest player counts, but here maps are large and game works well with hundreds of players. Matches are relatively short so you can jump in and see a full game play out. Curious what people think. https://ift.tt/2jx4qbC Gameplay: https://youtu.be/nrJTZEP-Cw8 Discord: https://ift.tt/r3LiFXI https://ift.tt/2jx4qbC March 16, 2026 at 05:51AM

Show HN: Fitness MCP https://ift.tt/UT3RQeJ

Show HN: Fitness MCP There's no external MCP for your fitness (Garmin / Strava) data, so we built one. https://ift.tt/plVOhRM March 18, 2026 at 11:00PM