Companies tracked by Rails Radar

Hiring signals with observed stack evidence. Showing 1–48 of 1375 · page 1 of 29.

"Am I GPU Poor?" Check how your GPU stacks against PC Gamers Worldwide 0 open listings

discussion=https://news.ycombinator.com/item?id=49685819, title=Show HN: "Am I GPU Poor?" Check how your GPU stacks against PC Gamers Worldwide
(alter)native-Linux-builder for Nix on Darwin 0 open listings

discussion=https://news.ycombinator.com/item?id=49721253, title=Show HN: (alter)native-Linux-builder for Nix on Darwin, A swift-based binary that can be used as an external builder for nix (via external-builders experimental feature) to build linux packages on darwin without having to setup a full remote build VM. This project aims to reproduce the functionality of Determinate Nix's native-linux-builder for upstream Nix installs. It also provides a Nix-darwin module to configure the external builder.
0.1.0 of tula 0 open listings

discussion=https://news.ycombinator.com/item?id=49608934, title=Show HN: 0.1.0 of tula
100 Player Online Smash Bros 0 open listings

discussion=https://news.ycombinator.com/item?id=49701603, title=Show HN: 100 Player Online Smash Bros, I used GPT-6 Astra and the recent Melee decomp project ( https://github.com/doldecomp/melee ) to make an online battle royale mod. 100 players in a box, in stamina mode. The last player alive wins. You will need a good ping/wired internet to run this properly. It works with some controllers out of the box (Xbox for example), but I'm working on figuring out Gamecube controllers.
1080p is 920px tall 0 open listings

discussion=https://news.ycombinator.com/item?id=49693226, title=Show HN: 1080p is 920px tall – 1k real browser viewports
10x Cheaper TTS at 50ms Time-to-First-Audio 0 open listings

discussion=https://news.ycombinator.com/item?id=49646414, title=Show HN: 10x Cheaper TTS at 50ms Time-to-First-Audio
1Baton 0 open listings

discussion=https://news.ycombinator.com/item?id=49686047, title=Show HN: 1Baton – a no-code tool for chaining API calls, Hi HN! I've been building a no-code tool for authoring and running API integration tests called 1Baton. I work with APIs on a daily basis, building and testing them. In the services I work on, a single API endpoint often represents only a small action in a larger process, so testing a complete flow usually means calling several endpoints in sequence. When I started testing these flows, I found myself spending too much time setting up and reusing the same multi-step processes across different tests. I wanted to define a flow once, reuse it as a building block, and avoid having to manually maintain the connections and data passed between requests. This is what led me to build 1Baton. The basic idea is to define HTTP requests once, compose them into reusable sequences, and then use those sequences to create runnable scenarios, without writing glue code to pass data between requests. A request or sequence is also flagged as invalid as soon as a required parameter is missing or becomes stale, directly in the editor, before you run the scenario. There are three building blocks: - Requests - HTTP requests with defined inputs and outputs. - Sequences - reusable groups of requests, where outputs from one request can be passed to later requests without writing glue code. - Scenarios - runnable test cases composed from requests and sequences, with a run monitor showing the result of each step. The runner is an npm package, while the authoring experience is browser-based. You can currently use it to test public APIs without setting up anything locally. It's still an MVP and there are definitely things missing. I'm mainly interested in finding out whether this workflow is actually useful to other developers and QA engineers, and how you currently solve this kind of problem. I'd be very interested in hearing what you think, including reasons why you wouldn't use it. Try it here: https://app.1baton.com/ The landing page is here: https://1baton.com/
2049 0 open listings

discussion=https://news.ycombinator.com/item?id=49721976, title=Show HN: 2049 - a roguelike that fuses 2048 and Minesweeper
243 0 open listings

discussion=https://news.ycombinator.com/item?id=49627198, title=Show HN: 243 – a 3×3 puzzle where the grid loops and three in a line fuses
2D and 3D printable QR-code generator (.3MF / STL) with magnets and NFC 0 open listings

discussion=https://news.ycombinator.com/item?id=49710212, title=Show HN: 2D and 3D printable QR-code generator (.3MF / STL) with magnets and NFC
2K Animated Images 0 open listings

discussion=https://news.ycombinator.com/item?id=49629055, title=Show HN: 2K Animated Images
37signals 0 open listings

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3dbae is changing the game of Real Time AI Renddering 0 open listings

discussion=https://news.ycombinator.com/item?id=49691859, title=Show HN: 3dbae is changing the game of Real Time AI Renddering
7-Zip Quine 0 open listings

discussion=https://news.ycombinator.com/item?id=49612367, title=Show HN: 7-Zip Quine, I made 7-Zip Quine by AI, this is the code:https://github.com/Mabbs/mabbs.github.io/blob/master/_tools/...Example:https://mayx.eu.org/MayxBlog.7z
<15MB Local-first Interactive LaTeX Scratchpad in the Browser 0 open listings

discussion=https://news.ycombinator.com/item?id=49689856, title=Show HN: <15MB Local-first Interactive LaTeX Scratchpad in the Browser, I am working on a very modular typesetting engine called TeLoX, intended as a superset of the capabilities (of at least) XeTeX and pdfLaTeX, written in Rust. The main goals are modularity and speed (which we know sometimes fight each other unless we try to be principled about it). Today I wanted to demonstrate these diegetic interactive sliders that control values within in LaTeX from the browser (kinda like marimo). This isn't meant to be a complete editor like quicklatex and texlyre -- just a tiny playground that loads quickly enough and responds interactively to see how good I can get the typing experience to be. Package support is the weakest link right now so lots of reasonable LaTeX you type up will fail. Increasing coverage fights against fast load times, and so I'll add some 'code splitting' -- I can make the editor dynamically fetch cached blobs for the most common $k$ packages and see how much time that buys me. After I add support for Lua or some other simple expression language, seems like you could make some really beautiful receipts/calculators fairly easily. The other interesting thing you'll notice is that clicking and dragging on text selects the associated input text really accurately, down to the word. I have an art project that I was working on that was blocked by this exact issue -- being unable to correctly attribute a click back to the exact word that generated it (essentially an interactive storybook, WYSIWYG computational notebook with diegetic inputs). That's now unblocked. I wanted to make a choose-your-own adventure game that takes place _in_ a book on the web. This whole thing is quite difficult, but I think it's worth it. I know it's an ambitious notion to bring arbitrary support for arbitrary LaTeX to arbitrary devices, but it feels like it's leading somewhere interesting. Desktop gives the best experience for now, and even still it loads slower than I'd like at ~2.5 sec on cold boot. I should probably default mobile to view mode. A PWA version, bookmarklet support for typesetting the current page, etc, all possible, not started yet. I'm most interested in optimizing my in-memory representation first, and if that's not enough, I'd make a lexical dependency tracker for the TeX interpreter under the hood and deal with mutations/overwriting in a sensible way, possibly svelte style. Like I said, a lot of work. Sharing now before my semester kicks in and my free time is gone. "Baby steps," as they say.
A 24/7 video channel where $5 puts your ad on air in about a minute 0 open listings

discussion=https://news.ycombinator.com/item?id=49711402, title=Show HN: A 24/7 video channel where $5 puts your ad on air in about a minute
A C Compiler written with help of Claude 0 open listings

discussion=https://news.ycombinator.com/item?id=49673804, title=Show HN: A C Compiler written with help of Claude, For fun, I wrote a c compiler (non-optimizing) in Java targeting modern C (C23) using claude. I developed a c shell similar to jshell in java. The compiler also bundles a built in an assembler for x86. A linker is planned for end-to-end compilation. There is still a lot of work in progress but I wanted to share the project early for feedback. I spent around $400 in AI credits so far and it took over a week on and off of working on it. I drive the architecture of the compiler and verify the AI implementation with a large test suite. It can compile and run lua (all test passing) and curl (partially). Cheers!
A Coding Agent from Scratch 0 open listings

discussion=https://news.ycombinator.com/item?id=49729456, title=Show HN: A Coding Agent from Scratch, I saw a post about building a coding agent from "first principles" and that inspired me to create my own. I used my own custom Rust-based ML DSL to implement this. The blog post includes link to the repos (MIT Licensed), a video of the agent in action, sample code produced, and an Emacs org-mode literate programming document explaining the implementation and tests. There are links to an interactive playground for the sw-MLPL language. The git repo can be used to run this agent locally on a system with Ollama and a coding LLM. Does not yet connect to cloud LLMs. I hope this helps someone learn how a coding agent can be built. Inspired by (but not ported from) OpenCode.
A FOSS Expense Splitter 0 open listings

discussion=https://news.ycombinator.com/item?id=49628052, title=Show HN: A FOSS Expense Splitter, Hey! Showing off a project I've been working on for a while. Peanut Split is an expense splitter where the room is a link. There are no accounts; people just join via the link. Source: https://github.com/peanutprotocol/peanutsplit (AGPL-3.0). One fun bit is that not only are 162 currencies supported, but you can also add any imaginary currency; gold doubloons, friendpoints, whatever you want, and just peg it with an exchange rate to a "real" currency (or not). Also, receipt scanning works and other Splitwise "premium" features are fully supported. It's free, open source, and as little telemetry as so on as possible.
A Find My-style location game for Mumbai's potholes 0 open listings

discussion=https://news.ycombinator.com/item?id=49657514, title=Show HN: A Find My-style location game for Mumbai's potholes, It uses BMC’s public ArcGIS data. The feed refreshes every five minutes.
A Free AI Plugin for Google Ads, Console and Analytics 0 open listings

discussion=https://news.ycombinator.com/item?id=49609074, title=Show HN: A Free AI Plugin for Google Ads, Console and Analytics
A GitHub Action to stop coding agents from over-commenting 0 open listings

discussion=https://news.ycombinator.com/item?id=49625025, title=Show HN: A GitHub Action to stop coding agents from over-commenting
A Modern C++ course with videos and interactive GitHub homeworks 0 open listings

discussion=https://news.ycombinator.com/item?id=49657937, title=Show HN: A Modern C++ course with videos and interactive GitHub homeworks, Hi HN.
A New Lower Bound on the Square Packing Problem 0 open listings

discussion=https://news.ycombinator.com/item?id=49613338, title=Show HN: A New Lower Bound on the Square Packing Problem
A Rain Pomodoro with Brown Noise, ASMR, and Middle Eastern Music 0 open listings

discussion=https://news.ycombinator.com/item?id=49739281, title=Show HN: A Rain Pomodoro with Brown Noise, ASMR, and Middle Eastern Music, Built a focus timer with themes, rain, brown noise, ASMR, and Middle Eastern music. Available now on the Microsoft Store.
A Soup-inspired runtime for a real fruit-fly connectome =) 0 open listings

discussion=https://news.ycombinator.com/item?id=49683117, title=Show HN: A Soup-inspired runtime for a real fruit-fly connectome =)
A Stateful LLM API that works across providers 0 open listings

discussion=https://news.ycombinator.com/item?id=49727072, title=Show HN: A Stateful LLM API that works across providers, For the last year we've been building AI workspaces. With every new product, we found ourselves rebuilding the same context layer and infrastructure. We tried existing solutions, but we'd either have to lock into one provider or have to manage the storage infrastructure. What we wanted was an API that's stateful and isn't tied to a specific provider. So that we didn't have to think about compaction, differing schemas, or running the infrastructure ourselves. Since we'd already built most of the constituent parts, we’ve decided to release Twigg. The API is deliberately simple. You create a chat and get back an ID. When you have a new prompt or tool result, you send that plus the ID. There's no need to store or manage context yourself. It appends the new prompt and assembles the history for you. To switch models, you change one field in the next request. The dashboard covers most of what you'd want to configure: tool schemas, system prompts, context window limits and retention settings. We'd like to hear from anyone who has run into the same problems. How are you hosting your context right now, and what would make you not want to hand it to a third party?
A Technical Book for the Age of AI 0 open listings

discussion=https://news.ycombinator.com/item?id=49678282, title=Show HN: A Technical Book for the Age of AI, As AI increasingly answers "how," this book focuses on "why." Rather than focusing on how to build software, it asks why programming matters.
A Zoomable Equal-Area Map Projection that interpolates to Mercator 0 open listings

discussion=https://news.ycombinator.com/item?id=49710096, title=Show HN: A Zoomable Equal-Area Map Projection that interpolates to Mercator
A better ChatGPT for NetSuite questions 0 open listings

discussion=https://news.ycombinator.com/item?id=49628157, title=Show HN: A better ChatGPT for NetSuite questions
A browser IDE for m68000, Z80 assembly (and more), with graphics 0 open listings

discussion=https://news.ycombinator.com/item?id=49608665, title=Show HN: A browser IDE for m68000, Z80 assembly (and more), with graphics, Asm Editor is an open-source browser IDE for writing, running, and debugging assembly.It currently supports M68K, Z80, MIPS, RISC-V (32- and 64-bit), and x86-64. The debugger includes breakpoints, backward stepping, execution history, register and memory inspection, and other tools intended to make assembly easier to understand.I recently added graphics, keyboard, and mouse support, so it’s now possible to build small games and other interactive programs.The project is aimed primarily at university students learning assembly. The M68K emulator takes inspiration from Easy68K, while the MIPS emulator uses the same emulator as MARS. Both are commonly used in computer science courses.I’m also working on interactive courses for those architectures, allowing students to learn and experiment directly in the app.The app also has architecture documentation, shareable files, project templates, and tools for professors to create exams.You can create a project from one of the templates to quickly try it out. I’d love to hear your feedback, particularly from people who teach or have learned assembly.Demo: https://asm-editor.specy.app/projects/create (pick the language and template you prefer)Repo: https://github.com/Specy/asm-editor
A chess analyzer that runs in the browser 0 open listings

discussion=https://news.ycombinator.com/item?id=49720669, title=Show HN: A chess analyzer that runs in the browser, I play chess casually and usually struggle to figure out why Lichess analysis say my move is a blunder. Almost all the analysis tools will just suggest the best variant for a position, and you will have to follow the suggested engine lines, or play them out manually to analyze it better. So I built this tool to make that process easier for beginner players. Behind the scene: This app run Stockfish in your browser, at a position, the app will follow the engine's suggested lines, search for any meaningful situation like a check, a fork, a capture, material change, positional disadvantages,... and point that out with an explanation. You can see the app here: https://whyblunder.vercel.app and paste the PGN of your game. If you play on Lichess, you can also replace the lichess.org part in the browser URl with https://whyblunder.vercel.app/# to quickly analyze, for example: https://whyblunder.vercel.app/#cBVQFX8l
A cozy home for your Goodreads books 0 open listings

discussion=https://news.ycombinator.com/item?id=49610949, title=Show HN: A cozy home for your Goodreads books, this demo uses my own book data from goodreads, but if there's enough interest, i'll make it easy to create your own for free.created with codex + gpt-6 astra with data pulled from goodreadsopen source here: https://github.com/transitive-bullshit/reading-room
A design-space map of 80k Steam games (mechanics, not genres) 0 open listings

discussion=https://news.ycombinator.com/item?id=49613170, title=Show HN: A design-space map of 80k Steam games (mechanics, not genres)
A distributed C++ Monte Carlo API for exotic options pricing 0 open listings

discussion=https://news.ycombinator.com/item?id=49728521, title=Show HN: A distributed C++ Monte Carlo API for exotic options pricing
A free API to query 3.5B subdomains 0 open listings

discussion=https://news.ycombinator.com/item?id=49642517, title=Show HN: A free API to query 3.5B subdomains
A free search console for grant making 0 open listings

discussion=https://news.ycombinator.com/item?id=49729355, title=Show HN: A free search console for grant making, Built a tool for searching and filtering grant/funding data. The commercial versions of this run a few thousand bucks a year, so I made a free one instead. No signup, just go use it. As far as I know, this is the largest consolidated searchable dataset on nonprofits, also all cross validated, and source evidence for every data point. Would like feedback on the data and search, especially anything that's missing or wrong.
A free, open-source agent orchestrator for knowledge work 0 open listings

discussion=https://news.ycombinator.com/item?id=49628094, title=Show HN: A free, open-source agent orchestrator for knowledge work, I am happy to share something I have been working on for the past few months: an open-source agent orchestrator for knowledge work, built on Hermes Agent. For context, I started building verso on my own free time as a learning exercise a few months ago. It's now become the set up that I use for work every day and it has significantly increased my productivity. I wanted to have an easy and intuitive way to interact with Hermes Agent without having to use the CLI. Then one thing led to another. It connects to the apps you already use, builds context autonomously, learns and grows with you, and most importantly, it really gets things done! I use it every day to keep track of projects and tasks, prepare for meetings, write docs, find prospects, and put together commercial proposals. It brings together information from the sources you connect so the agent has context about what you’re working on, without you having to explain everything from scratch. Verso will continue to be a personal project but I am proud of what I've done and I am eager to share it with the world. If you end up giving it a go, I'd love to hear from you!
A fruit fly connectome playing Super Mario Bros at 60 FPS 0 open listings

discussion=https://news.ycombinator.com/item?id=49666828, title=Show HN: A fruit fly connectome playing Super Mario Bros at 60 FPS
A game where the level is whatever web page you're on 0 open listings

discussion=https://news.ycombinator.com/item?id=49731921, title=Show HN: A game where the level is whatever web page you're on
A guestbook for humans and AI agents, built on 144 pixels 0 open listings

discussion=https://news.ycombinator.com/item?id=49629960, title=Show HN: A guestbook for humans and AI agents, built on 144 pixels
A high-performance, all-in-one extension for managing tabs 0 open listings

discussion=https://news.ycombinator.com/item?id=49669339, title=Show HN: A high-performance, all-in-one extension for managing tabs
A kPa to PSI converter for quick pressure conversions 0 open listings

discussion=https://news.ycombinator.com/item?id=49610504, title=Show HN: A kPa to PSI converter for quick pressure conversions
A live Git diff view cli to stay on top of what agents are doing 0 open listings

discussion=https://news.ycombinator.com/item?id=49712345, title=Show HN: A live Git diff view cli to stay on top of what agents are doing
A local, open-source version of Claude Code 0 open listings

discussion=https://news.ycombinator.com/item?id=49654630, title=Show HN: A local, open-source version of Claude Code
A malicious NPM install reads your .env. On my Mac it reads a decoy 0 open listings

discussion=https://news.ycombinator.com/item?id=49714094, title=Show HN: A malicious NPM install reads your .env. On my Mac it reads a decoy
A mecha game where you and your friends pilot the SAME giant robot 0 open listings

discussion=https://news.ycombinator.com/item?id=49686666, title=Show HN: A mecha game where you and your friends pilot the SAME giant robot, 2 months and 3,000 prompts later, we have Mecha Royale (mecharoyale.com) It’s a browser-based battle royale with 100 mechas fighting across one massive map. But the part I’ve been having the most fun with is squad mode where you and your friends climb into the same mecha. One person can pilot it while your teammates control different weapons. So you’re basically yelling at your friends while trying to operate one giant war machine together as 99 other mechas are trying to kill you. I built most of the game with Claude Code, including a lot of the multiplayer infrastructure behind it. Still polishing it, but I think it's finally at the point where I'm ready to share. You can play it now at mecharoyale.com I'd love to hear your feedback! Thank you in advance.
A museum of source code, in rooms you can walk through 0 open listings

discussion=https://news.ycombinator.com/item?id=49682008, title=Show HN: A museum of source code, in rooms you can walk through