Show HN: Using 2D DFT, dithering, etc. to maximize eInk manga image quality https://bit.ly/4hma5Fy

Show HN: Using 2D DFT, dithering, etc. to maximize eInk manga image quality Kindle Comic Converter optimizes black & white (or color) comics and manga for E-ink ereaders like Kindle, Kobo, ReMarkable, and more. Pages display in fullscreen without margins, with proper fixed layout support. Output works great in KOReader. Full details on what KCC does is in the readme with plenty of photos! KCC has been under continuous development since 2012 and has code sign on both Windows and macOS. Also available on Linux. -the current kcc dev https://bit.ly/42qj2F4 September 28, 2026 at 04:39PM

Show HN: Social news aggregator, RSS feed tracker, and publishing platform https://bit.ly/3VmwUQP

Show HN: Social news aggregator, RSS feed tracker, and publishing platform I wrote two prior RSS feed aggregator apps a few years ago, based on Electron, for my own personal use ( https://bit.ly/3ViYazO ) and earlier this year I decided to see whether the concept would work as a hosted app. Going with a multiuser system seemed to point toward more social features and the project has evolved into a combination of news aggregation site, personal news tracker, and social publishing service. Feel free to suggest possible improvements. https://bit.ly/3VkWwh1 September 30, 2026 at 01:04AM

Show HN: Ledge.sh – Runnable Markdown Notes https://bit.ly/4xT6sMk

Show HN: Ledge.sh – Runnable Markdown Notes Hi HN, Ledge is a Markdown notebook that runs shell commands, code, SQL, etc from inside your own notes. I built Ledge because I spend much of my day copy/pasting commands from my notes into the terminal. I was inspired by how much cmux helped me organize my terminals - but there was still a split brain between my notes and frequently run commands. I've been daily-driving it for the past few weeks and use it for deploys, API calls, smoke tests, etc. Ledge runs your real shell just like a terminal app and can be hosted locally or remotely over SSH using ledge-server. I've been building it since July and have recently added support for all the major platforms: Mac (Silicon), Windows (WSL required), Linux, iOS, Android. Mobile devices require SSH access to a ledge-server and Android is still in beta and looking for beta testers (see link on website)! It's built on Bun and Electrobun and is free and open-source. Feel free to review the code and contribute at https://bit.ly/46R5vZO Feedback is very much welcome. Any must-have features that are missing? https://bit.ly/3Vb5cGL September 30, 2026 at 12:41AM

Show HN https://bit.ly/4xJOUC1

Show HN This is origintracer a low level observability tool of the modern web stack. It observes nginx, Gunicorn, asynchronous Python, Uvicorn and Django and Langchain. Studies their codebases into great depth and write probes and rules libraries in Python to be used with the open source software: its link GitHub: https://bit.ly/4dKZQZ1 September 29, 2026 at 12:58AM

Show HN: Stepgate – an MCP server that won't let agents skip steps https://bit.ly/4xNS1Ji

Show HN: Stepgate – an MCP server that won't let agents skip steps https://bit.ly/47r1NGk September 28, 2026 at 01:57AM

Show HN: Fusor – Like Vue, but the logic is Rust https://bit.ly/4hhnGOh

Show HN: Fusor – Like Vue, but the logic is Rust I've been building Fusor. It's a reactive web framework for Rust where the templates are plain HTML files, so there's no markup living inside Rust macros like view! or rsx!. The state and logic live in ordinary Rust structs, and the whole app compiles to WASM. It also benefits from Rust type checkers, even for the HTML bindings. The Fusor website is fully built using the framework. It's all experimental, so I expect breaking changes and lots of refactors. Any feedback is welcome, and so are contributions! The project is pro AI, if you do decide to contribute. https://bit.ly/4hOuDXk September 27, 2026 at 11:45PM

Show HN: LightCloud – A cloud console organised like file system https://bit.ly/4jqq5rd

Show HN: LightCloud – A cloud console organised like file system Hi HN, Light Cloud is a hosting platform where the unit of organisation is a folder. A folder holds everything project needs: frontend, API, database, env variables, preview per branch. https://bit.ly/3V9BIJj September 27, 2026 at 10:45AM

Show HN: An interactive debugger for the Mornington Crescent esolang https://bit.ly/4z4ZBR0

Show HN: An interactive debugger for the Mornington Crescent esolang Originally put together ten years ago, I've migrated this project over to Codeberg and in the process fixed a couple of bugs. The most glaring issue was that in the intervening years, CORS has become a thing so the Transport for London Tube map can no longer be loaded directly from their site; instead, there's a local copy of the SVG. I'm happy with where it is at the moment, there might be more small patches in another ten years. https://bit.ly/46LZBt0 September 27, 2026 at 08:53AM

Show HN: Ppgrid – Rasterising points in minutes, not hours https://bit.ly/4d8yBaz

Show HN: Ppgrid – Rasterising points in minutes, not hours Hi all, I wanted to share a recent library I made for myself since I continually have to work with large-scale point data spanning millions of rows. I generally found existing IDW tools are insanely slow and unreliable with the datasets I commonly work with. ppgrid is an open source GIS tool and it is intended to create beautiful visualisations that don't take an absurd amount of time to process. It uses a modified Inverse Distance Weighting (IDW) approach: instead of having to traverse every single point for every single grid O(N*M), it precalculates which points intersect which grids. This means that we essentially avoid the multiplicative scaling costs associated with traditional IDW. For perspective, ppgrid is significantly faster than IDW from the likes of gdal_grid or GRASS, in the order of 17x faster. I say in the order of as I couldn't really effectively test IDW on the crappy laptop I use beyond 1M points, where as ppgrid happily chewed through 16mil points. My goals/intention for this post is twofold: - looking to share it as a tool for anyone who may find it relevant or useful - looking to stress-test it with different types of point data and try to surface any quirks, bugs or random edge case failures Important note which I discuss more in my write-up: ppgrid is not yet stress-tested or validated in terms of statistical correctness, as my current use case prioritises visualisation. AI Disclosure & Creds: I've been pair-coding this with my local Qwen3.8 27B agent, I discuss this in my write-up further. I have ~9YoE in GIS work and ~10YoE as a fullstack. GitHub Repo: https://bit.ly/4d9jDBc Any other feedback/comments are welcome, please let me know if this has helped as I'd love to see it in action. https://bit.ly/3V9wfSN September 27, 2026 at 08:22AM

Show HN: Shipwithmuse.live – a catalog of things people built with Muse https://bit.ly/4hMIkWG

Show HN: Shipwithmuse.live – a catalog of things people built with Muse https://bit.ly/4yhJsaF September 27, 2026 at 06:38AM

Show HN: Hacker Atlas - A map of what Hacker News talks about https://bit.ly/46GEdVY

Show HN: Hacker Atlas - A map of what Hacker News talks about I built a tool to explore HN topics and how they change over time. Currently covers 2024 to today. Is it useful? What's missing? https://bit.ly/4z46TEB September 25, 2026 at 02:37PM

Show HN: TiddlyInstall – Single HTML file that makes cross-platform installers https://bit.ly/4rus7J9

Show HN: TiddlyInstall – Single HTML file that makes cross-platform installers Hello HN, I wanted to show you some new software I designed (and Claude implemented.) It's called TiddlyInstall. TiddlyInstall is a single-page website that lets you easily build installers for all your projects. What makes TiddlyInstall unusual is there is no software to download and everything is able to work offline. Based on the project that it's inspired by: you can download TiddlyInstall as a HTML file and use it to make working binaries for Windows, Linux, and Mac. How it works: Most installers / binaries are custom per project. But with very few modifications they can be made general-purpose. Installers can be made to follow meta-data which can be vouched for by hashes in their file names, embedded data, and signatures. That means new binaries only need meta-data to be changed which can be done entirely in the browser. For the installers themselves NSIS was chosen for its amazing Windows support. Otherwise, the rest is shell scripting. I am very excited about it and would love people to try it out. All the code is open source under MIT. Feel free to report issues on the Github at https://bit.ly/4yXkCge Credits: Claude (and the authors whose works it was trained on :/) deserve huge credits for the implementation. It would have taken me months to code this all this. This project is not affiliated with TiddlyWiki -- though I am heavily inspired by that project! If anyone thinks my work is cool -- I'm currently looking for new opportunities. Feel free to reach out if there's a match (matthew@roberts.pm.) https://bit.ly/4yXkD3M September 25, 2026 at 08:25AM

Show HN: A benchmark comparison of C++ vs. Node.js performance https://bit.ly/4hbBGsX

Show HN: A benchmark comparison of C++ vs. Node.js performance https://bit.ly/4rrXK5S September 25, 2026 at 06:25AM

Show HN: Reteach – AI tutor that feels human https://bit.ly/4rwfWvm

Show HN: Reteach – AI tutor that feels human Tutoring is very expensive. reteach makes it cheap. https://bit.ly/3Thxgrj September 25, 2026 at 07:26AM

Show HN: Avoid smooth spinners, use low-FPS spinners https://bit.ly/4hbvCR8

Show HN: Avoid smooth spinners, use low-FPS spinners I got so annoyed by various apps (VScode, Chromium, Firefox, Thunderbird) burning CPU/GPU cycles and and making my laptop hot and sluggish with spinners on otherwise static content, that I made this little page to fight this. https://bit.ly/3TLgHnP September 25, 2026 at 03:52AM

Show HN: An open-source manufacturing ERP/MES/QMS https://bit.ly/4xEOmxa

Show HN: An open-source manufacturing ERP/MES/QMS https://bit.ly/4xEOnkI September 24, 2026 at 01:45AM

Show HN: Fjordfall – Take the long way down https://bit.ly/4xNYzHT

Show HN: Fjordfall – Take the long way down https://bit.ly/4hlrUTN September 23, 2026 at 11:19PM

Show HN: Sbm: plain-text bookmarks synced across terminal, browser, Android https://bit.ly/4hFWBEC

Show HN: Sbm: plain-text bookmarks synced across terminal, browser, Android https://bit.ly/4rqqzjf September 23, 2026 at 03:54AM

Show HN: WavexAI – Unlimited tokens for a fixed cost https://bit.ly/4jjjTRO

Show HN: WavexAI – Unlimited tokens for a fixed cost https://bit.ly/4rqDmSJ September 22, 2026 at 11:24PM

Show HN: An atlas of system designs with interactive architecture diagrams https://bit.ly/4xCtfeY

Show HN: An atlas of system designs with interactive architecture diagrams https://bit.ly/4y8uLXh September 22, 2026 at 11:54AM