Show HN: Dental Scope – Interactive 3D dental anatomy https://ift.tt/dhEpx8V

Show HN: Dental Scope – Interactive 3D dental anatomy https://ift.tt/VNecL2T September 29, 2026 at 07:47AM

Show HN: WattzGOAT – an intentionally vulnerable web app for security training https://ift.tt/w8KpmH3

Show HN: WattzGOAT – an intentionally vulnerable web app for security training Built this as a hands-on lab for teaching web application security. It is a fictional electricity utility's customer portal with 48 deliberately planted flags (most of OWASP Top 10) you find and exploit CTF-style, including a simulated (rule-based, not a real model) AI assistant with its own prompt-injection-style vulnerabilities. Full disclosure, built this with AI assistance but I promise you're going to enjoy tinkering with it. https://ift.tt/Zg7ntYv September 30, 2026 at 11:31PM

Show HN: Real-time Solar System with 526k asteroids and all tracked satellites https://ift.tt/nN6gY8q

Show HN: Real-time Solar System with 526k asteroids and all tracked satellites https://space.bl2.net/ September 30, 2026 at 02:08AM

Show HN: A working 3D model of an Enigma machine https://ift.tt/vODLw2d

Show HN: A working 3D model of an Enigma machine I watched the excellent Veritasium video [1] on the Enigma machine, and watched the full animation by Jared Owen [2], but was still a bit confused on how the inner mechanics of an Enigma machine work. I used Astra to build out the inner components through a combination of reference images, writing out hundreds of extremely detailed prompts, and building my own inspection tools to ensure that every part is sized and positioned in a historically accurate way. It's still a work in progress, but would love any feedback on the experience so far! 1. https://www.youtube.com/watch?v=JsBZOcqZerk 2. https://www.youtube.com/watch?v=ybkkiGtJmkM https://enigma.design September 30, 2026 at 12:15AM

Show HN: Free browser games designed for 80-year-old eyes and hands https://ift.tt/9G2rwbI

Show HN: Free browser games designed for 80-year-old eyes and hands https://ift.tt/eYASJT3 September 29, 2026 at 10:45PM

Show HN: HN.watch – Videos of all Hacker News posts https://ift.tt/vnltNaE

Show HN: HN.watch – Videos of all Hacker News posts Hi HN, I’m Per, founder of Scrimba (YC S20). We’ve spent the last decade teaching people how to code with an HTML-based video format. We’ve now plugged an LLM into it, so that people can create explainer videos about anything. It’s called “Scrimba Explain”. To demo this technology for Hacker News, we built HN.watch. It’s like HN, but with explainer videos instead of articles. We create them on-the-fly the first time someone clicks on a link. While there are obvious visual drawbacks of using HTML instead of diffusion models, there are three big benefits: - Speed: Much faster to generate than pixel-based videos (just a few seconds from click to playback) - Cost: Our cost per video is ~$0.04. (Excluding image generation, which some videos utilize. Quickly blows up the cost) - Easy editing: the above benefits also make AI-assisted editing cheap & fast Our hypothesis is that if video creation goes from “dollars and minutes” to “cents and seconds”, a bunch of new use cases will be unlocked. Here are some we see already: - A video explanation of every single Pull Request (we do this internally) - Give every page in your internal/extrernal docs a video - Turn a complex article into a video in ~4 seconds (via our Chrome extension) - Course creators can quickly draft lessons before recording the real thing - People also create a lot of personal stuff stories for their kids, wedding invitations, birthdays, etc The stack is based on an open-source programming language (Imba) created by our CTO, Sindre Aarsæther. It compiles to JavaScript, so it interoperates fully with the npm + node ecosystem. You can learn more here: https://imba.io/ We’ve also built our own sync engine (OP), and a context management system for agents (Q). We feared this would make the LLMs struggle when writing code for us, as neither is in their training data (there’s very little Imba in there too). However, we’ve been pleasantly surprised to see that LLMs actually are really good at our stack. This is probably because the stack is extremely dense. Imba is compact, and so is OP, where a single declaration sets storage, sync, permissions, UI, and what the AI sees. This means there’s no translations between frontend, API, db and JSON where the model can get confused and get things wrong. Simply said, instead of using React.js, Express, Supabase, and LangChain, we built it all from scratch. Definitely suffering from the “not invented here” syndrome, lol! As for the models, we use Gemini, GPTs, Inworld, ElevenLabs, and a few others. If you want to try it out, just take your pick: - The Web UI (scrimba.com/explain) - MCP (add it to your coding agent) - ChatGPT Plugin - Chrome Extension You can find a link to all of the above in our docs: https://ift.tt/wSk6sza And finally, a real pixel-based video of the tool: https://www.youtube.com/watch?v=k6rbHmBxSEs Would love to hear your feedback and if anyone has ideas for other use cases. PS: I expect quite a bit of pushback from HN for this launch, given how fan of text the HN crowd is. This kind of tool is not for everyone. But there are a lot of people today who prefer videos over text, especially in the younger generations. https://hn.watch/ September 28, 2026 at 10:16PM

Show HN: I built an idle game that rewards you for doomscrolling less https://ift.tt/3vIceTO

Show HN: I built an idle game that rewards you for doomscrolling less https://getisland.app/ September 28, 2026 at 10:59PM

Show HN: Gat – Version large files with Git, without an LFS server https://ift.tt/MT4OvVw

Show HN: Gat – Version large files with Git, without an LFS server Hi HN, I built Gat because I wanted one thing from data versioning: check out an old Git commit and recover the datasets, model weights, or assets that belong to it. It's basically a lock file for large files. I’d appreciate any feedback! https://ift.tt/Wsdmutk September 28, 2026 at 12:20AM

Show HN: Lofi Cities – Pixel-art city nights with browser-generated lofi https://ift.tt/bZCluY9

Show HN: Lofi Cities – Pixel-art city nights with browser-generated lofi https://loficities.com/ September 28, 2026 at 01:44AM

Show HN: Banker – CLI for your finances using Enable Banking and SQLite https://ift.tt/k5UD0AB

Show HN: Banker – CLI for your finances using Enable Banking and SQLite Hi HN, here, what started as a small personal tool, I wanted to create an AI agent-friendly way to fetch and store financial data, like bank accounts, their respective balances and transactions and store them in a small SQLite database, to gather all of them in a single place, store them long term, and assign arbitrary metadata, for example, expense categories, etc. There are not many PSD2 compliant providers, that allow access to personal bank accounts, but Enable Banking is one of the rare few. That is why it is the core of the engine used to access the financial data from different ASPSPs. Thus, it is quite easy to register and set up a personal "application" and link your existing bank accounts to access them in the banker CLI. I hope you find it useful! https://ift.tt/WUXeKG2 September 27, 2026 at 11:32PM

Show HN: Jev predicting your life choices https://ift.tt/cfGW2oM

Show HN: Jev predicting your life choices Built a simple quiz to check whether AI (Jev) can simply learn and predict life choices. Experiment) https://quiz.seek.ws/ September 26, 2026 at 11:24PM

Show HN: Spivak's Calculus formalized in Lean 4 – every theorem, every problem https://ift.tt/alxscPK

Show HN: Spivak's Calculus formalized in Lean 4 – every theorem, every problem https://ift.tt/kx31T7Q September 27, 2026 at 12:00AM

Show HN: Jev Plays Pokémon Red https://ift.tt/6pirsvc

Show HN: Jev Plays Pokémon Red Hey HN! Wanted to share a fun project I've been hacking on. Given Jev can make decisions really fast (but not fast enough to play Doom yet sadly), I wanted to try and push it to play a more complex game than Tetris. So I went with Pokémon. I've spent endless hours playing this game as a child so building this was a ton of fun. I open sourced everything in case you want to hack on it yourself here: https://ift.tt/835SZ9t The game is being streamed live including the tokens and cost - hopefully we get all the badges and don't get stuck in a cave :) https://jev-pokemon.vercel.app/ September 25, 2026 at 09:28PM