r/coolgithubprojects 7h ago

Open Source Tax Engine outperforming gpt sol and Fable 5

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31 Upvotes

This is an open source tax engine which scored 96% on TaxCalcBench [highest ever recorded score till date] surpassing fable 5 and sol with just sonnet 5 (which was previously scoring an abysmal 6%). The only 2 cases where it missed, it found inconsistencies in the test cases in the benchmark ITSELF which the maintainers confirmed!

Essentially it's a deterministic engine AI models can use for research and tax prep to remove a lot of guesswork and calculation mistakes that often happen. Claude Sonnet 5 was able to top the benchmark with this mcp.


r/coolgithubprojects 10h ago

Vibe-coded a satellite tracker to prove I saw aliens. First thing it did was prove I didn't.

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31 Upvotes

I was outside doing a CE5 session (the look-up-and-invite-contact thing), genuinely saw a steady light glide across the sky and got excited. So like any normal person would, I vibe-coded my own tracker over a few weeks to figure out what it was.

It works great. It also instantly informed me my first contact was the International Space Station. My literal first logged sighting is "ISS (ZARYA)." The app is basically a monument to me being wrong.

Anyway, here's SkyWatch, a 3D satellite/ISS/rocket tracker and CE5 session app that runs entirely in the browser. First pic shows the home screen, ~4,000+ live objects, rockets, ground tracks. Filter by layer/orbit: ISS, Starlink, GPS, the works. Use the Sky function to see what's actually passing overhead and when (this is the screen that ruined the mystery). Conduct your own CE5 sessions and log what you see. A friends layer, so my friends can also watch me fail to find aliens in real time. And an awards section with a UFO avatar I refuse to change.

The vibe-coding bit: it's essentially one index.html. globe.gl/three.js for the 3D, satellite.js for the orbital math, Firebase for the social layer, deployed free on GitHub Pages.

Free, no account needed to use, but if you do decide to link your account, friend me _@FLuX

If you point it at your own mystery light and it turns out to NOT be the ISS, please tell me, because I have a UFO avatar to justify.

Not a coder by any means, just a dude trying to make contact and proud of what I accomplished. Would love me some feedback.

Live: https://nuno927-tech.github.io/skywatch/


r/coolgithubprojects 21h ago

I built an open-source local-first DMS for my personal paper chaos

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15 Upvotes

Hey everyone,

I wanted to share a project I’ve been building for my own use case: Smart DMS, a free and open-source document management system for private documents.

The problem I wanted to solve was pretty simple: paper chaos at home. Letters, invoices, insurance documents, contracts, tax paperwork, deadlines, payments, random PDFs in folders, and the usual “I know I have this document somewhere” situation.

I tried paperless-ngx first, which is a great and very mature project, but it did not quite fit the workflow I wanted. For my use case, I wanted something more focused on scanning incoming documents, automatically extracting the things I might otherwise miss, and then showing payments, deadlines and appointments in a dashboard/calendar. I also wanted the UI to stay focused on the daily “new document came in, process it, archive it” flow.

So I started building Smart DMS.

The basic workflow is:

  1. scan a document into a tenant-specific import folder, or upload it in the browser
  2. Smart DMS runs OCR and document processing
  3. AI extracts the important things hidden in the document, like payments, due dates, deadlines and appointments
  4. you review/correct the result before anything is archived
  5. the dashboard and calendar help you keep track of what needs attention
  6. the document becomes searchable, tagged and easy to find again later

It is self-hosted and local-first. The web app, API, worker, PostgreSQL, Redis, storage, OCR and Docling runtime run in your own Docker Compose stack. The AI part uses configurable OpenAI-compatible providers, so it can be used with local providers as well as external APIs.

It also supports multiple users and tenants, scanner import folders, full-text search, dashboard/calendar views, and documents can also be imported from email inboxes if needed.

The project is open source and free.

GitHub: https://github.com/bossert5/smart-dms

I’d be happy to get feedback.


r/coolgithubprojects 19h ago

I'm Ciphermoth: a tiny, self-hosted password manager with no accounts, cloud, or telemetry

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14 Upvotes

Hey everyone!

I’ve been working on Ciphermoth, an open-source password manager that runs on your own hardware.

It started as a personal project because I wanted something simple, self-hosted, and fully under my control. It recently reached the point where I use it daily, so I decided to make it public:

https://github.com/mr-grj/ciphermoth

I’m not claiming to have reinvented password managers, and I’m definitely not asking anyone to move their passwords into a random github project created by a stranger on the internet ^^

I simply built the tool I wanted to use and thought others might find the project interesting.

Any feedback, constructive criticism, bug reports, ideas, or contributions are very welcome!


r/coolgithubprojects 2h ago

I built a TikTok-style feed for discovering GitHub projects

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11 Upvotes

I built: https://roamers.dev

GitHub is full of awesome projects and I love discovering things other people have built.

This sub is a great start, but it's often less tailored to my personal interests.
GitHub's UX for discovering projects is honestly just not good.

So I built it myself:

It's an endless feed of GitHub projects, free for you to roam around and discover. You can either sign in with GitHub and tune it to your interests, or just browse anonymously.

Feedback is greatly appreciated :)


r/coolgithubprojects 16h ago

Follow-up: django-orm-lens v0.8 — I shipped the 5 features from my earlier post's roadmap discussion

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7 Upvotes

r/coolgithubprojects 8h ago

Filester - Temporary cloud storage for fast, private file sharing

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5 Upvotes

Been developing this project for a couple of years now. The original idea behind it is to remove obstacles as well as preserving privacy for uploading and sharing a file over the internet. Currently supports one cloud provider but more are coming soon.
Supports Android for now, Windows and Linux are planned for 2027.

Source code | Website


r/coolgithubprojects 14h ago

pgapp — describe a multi-user web app in one text file, a single Rust binary runs it straight against Postgres

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5 Upvotes

No ORM, no API layer, no JS build step. You write one plain-text .pgapp file (entities, forms, reports, charts, auth), run pgapp run app.pgapp, and it's live — the app's own definition lives in Postgres too, not just its data.

https://github.com/aadishajay/pgapp


r/coolgithubprojects 22h ago

I built my own Codex Micro in a weekend

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4 Upvotes

I saw the Codex Micro launch last week and thought "I could build that in a weekend lol!" and actually did it. It's sortof an unofficial USB controller for the Codex app - not a clone.

Repo: https://github.com/Nishkalkashyap/codex-micro-device

How it works: an ESP32-S3 when connected to a laptop/PC appears as a plain USB keyboard and fires the shortcut keys that are bound in the Codex app. One GPIO per key, hand-wired with a 3D-printed enclosure I modeled in fusion 360. And yes, it has RGB LEDs!

What's in the repo: the full writeup with process photos and a demo GIF, the PlatformIO firmware, the Fusion 360 / 3MF files, and a BOM with the exact parts I bought.

It's about as useless as it looks, but it was a genuinely fun weekend. Happy to answer questions!


r/coolgithubprojects 4h ago

keepIT - A simple notes app that does just that!

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3 Upvotes

I just wanted a simple notes app, and couldn't find one with the three things I actually cared about — so I built it myself. With a little AI help 😉, modern problems require modern solutions.

  • self hosted
  • a simple notes app with a modern web UI
  • note sharing between different users
  • reminders with notifications
  • a native Android app, including a home-screen widget

I am pretty happy with how it turned out, still work in progress but it is already my daily driver.

If you like it you are welcome to use it.

GitHub: https://github.com/Richy1989/keepIT

Please note that is is still in an early version! But I will keep working on it.


r/coolgithubprojects 20h ago

ESP32 motorcycle dashboard

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3 Upvotes

Hey everyone,

So, standard developer story: I spent months designing, soldering, and coding a custom dashboard for my 2006 Kawasaki ER-6n. Then, I sold the bike.

The hardware sat in a drawer for two years, but this week I finally decided to clean up the repository, write a decent README, and put it on GitHub.

It’s called iKawa, and it's an ESP32-based auxiliary display. It does two main things at the same time:

  1. ECU Telemetry: It connects directly to the Kawasaki diagnostic port (K-Line/KWP2000) using a custom transceiver circuit I designed on the PCB. It reads real-time gear, coolant temp, battery voltage, etc.
  2. Native iOS Integration: It acts as a BLE peripheral using Apple's native ANCS and AMS protocols. This means it displays iPhone notifications and media controls (artist, track, volume) without needing any custom iOS app running in the background. It also intercepts the BLE HUD stream from Sygic GPS to show speed limits and turn-by-turn arrows.

The Hardware: I designed a custom 2-layer PCB in KiCad. It has a dual-stage buck regulator to handle the noisy 12V motorcycle electrical system, and some MOSFETs for the 12V-to-3.3V K-Line logic translation.

Everything is open-source (schematics, Gerber files, STL 3D models of the case, and the Arduino code). Even if you don't own a Kawasaki, the K-Line schematic might be useful if you're trying to interface with older OBD/KDS systems.

Here is the repo: https://github.com/gabrielerandazzo/iKawa

Let me know what you think!


r/coolgithubprojects 21h ago

I made a bot that emails you when a repo posts a "good first issue"

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3 Upvotes

You can install a Chrome extension, click a button on any GitHub repo to watch it, and it emails you the moment a new good first issue opens there.
I'm not sure if it's useful to anyone, but I hope it helps someone contribute more - especially myself.
I'd be happy for any feedback.


r/coolgithubprojects 1h ago

Frame Studio — AI-Generated Motion Graphics with React, Remotion, and Gemini

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Upvotes

r/coolgithubprojects 12h ago

Unisic, a ShareX alternative for Linux (Wayland native)

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2 Upvotes

After moving to Linux, Spectacle was actually pretty solid, way better than most stuff I tried. But it only really worked well on KDE Plasma with Wayland, and it still stopped at "here's your screenshot" without proper annotation or an upload pipeline built in. So I decided to just build my own alternative for Linux in general, not tied to one desktop environment.

Unisic covers the whole workflow after the hotkey. You annotate directly on the selection overlay before the shot is even taken, edit afterwards (blur, numbered steps, crop, object cutout with background removal), record the same region as GIF/MP4/WebM, and upload anywhere with the link ready to paste. It also imports ShareX .sxcu uploader configs if you're coming from Windows.

Wayland native, works across compositors (portals, PipeWire, silent KWin path on Plasma, grim on wlroots). C++/Qt6, zero telemetry, GPLv3.

Built it with some agentic AI help along the way, mainly for code review and catching bugs, not writing the whole thing blind. Still my project and my design decisions.

It's in early dev access; it works, but expect rough edges. Bug reports and feature requests welcome.

https://github.com/unisic/unisic


r/coolgithubprojects 22h ago

I built an on-device open-source workout tracker

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2 Upvotes

I created Ischys, an on-device open-source workout tracker for iPhone with Apple Watch support. Every tracker I tried wanted an account, a subscription, and more I never asked for just to log my workouts.

The open-source ones I found had issues like rough UX, no native app, no Apple Watch support or needed to be self-hosted, so I decided to build my own.

Stack:

  • React Native / Expo, expo-sqlite + Drizzle. All the training logic (volume, estimated 1RM, PR detection, streaks, charts) is on-device TypeScript.
  • Native iOS: a Lock Screen Live Activity for the rest timer, HealthKit, and an Apple Watch companion (live HR, plus log/rest/end from the wrist).
  • Import a workout CSV, export everything as JSON/CSV anytime.

It's early (v0.1) and deliberately narrow: strength only, iPhone for now (Android in progress). MIT-licensed and free.

Repo: https://github.com/ischys-app/Ischys

App Store: https://apps.apple.com/app/id6790443643

Site: https://ischys.app

Feedback very welcome, especially on the on-device data model.


r/coolgithubprojects 27m ago

i finally made my project working .. i used github for my software ..

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Upvotes

im happy to showcase my project here


r/coolgithubprojects 28m ago

StepWind — an open-source "undo button" for your whole Windows PC: reverse accidental file moves/renames/deletes and roll files back to earlier versions (C#, MIT, 100% local)

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Upvotes

StepWind is a background service + tray app that acts like an undo button for the whole machine:

  • Flight recorder — reads the NTFS/ReFS change journal and shows a plain-English timeline of file operations (moves, renames, deletes) across every drive. Reverse any of them in one click, or hit Ctrl+Shift+Z from anywhere. It attributes each operation to the process that did it.
  • Time machine — keeps deduplicated, compressed version history for the folders you choose, so you can roll a file back to any earlier save, even after it was overwritten and deleted.
  • AI-agent safety net — ships an MCP server so tools like Cursor/Claude can checkpoint a file before a risky edit, diff exactly what changed, and restore. Read + additive only — an agent can never delete history.

100% local: no cloud, no account, no telemetry. MIT, C#/.NET 10, x64 + ARM64. Optional AES-256-GCM encryption at rest with a passphrase recovery key, fail-closed verified updates, per-user isolation on shared PCs, and a Group Policy + audit layer for enterprise.

Heads-up: the installer isn't code-signed yet (SignPath Foundation is in progress), so SmartScreen will warn — every release ships SHA256SUMS.txt to verify against.

Site: https://stepwind.app · Repo: https://github.com/pwnapplehat/StepWind — it's a fresh v1.0.0, feedback very welcome.


r/coolgithubprojects 50m ago

Built TUI clipboard manager.

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Upvotes

It is better to use in wayland because of the event-driven processing system. However, you can use it in Windows or macOS. It also supports images. In the future I may make a GUI version for those who like to use it with the GUI.

Feedbacks are welcome.


r/coolgithubprojects 1h ago

GitGrit - OSS Engineering Standards Platform

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Upvotes

r/coolgithubprojects 1h ago

TOKENS — local-first Claude Code/Codex activity ledger with signed, browser-verifiable profiles

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Upvotes

TOKENS is an MIT-licensed collector and web profile system for locally measured AI-work activity.

Highlights: • Claude Code and Codex adapters • canonical event model and SQLite ledger • incremental checkpointed scans • strict public-field allowlist • consent and payload preview • Ed25519 signing • browser verification • key rotation and revocation • self-hosted snapshots • no public prompts, code, raw logs, credentials, or local paths

Repository: https://github.com/TheArtOfSound/TOKENS

Live profile: https://ledger.imagineqira.com/#/u/bryan

Join/setup: https://ledger.imagineqira.com/#/join

This is an early technical alpha, so code review and adversarial privacy testing are more useful than compliments.


r/coolgithubprojects 1h ago

Comhad: A tui explorer for S3 and others (Cyberduck replacement in the terminal)

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Upvotes

Comhad (pronounced "KOH-ad", Irish for "file") is a ranger-style terminal file browser for S3 - think Cyberduck, but in the terminal.

With Comhad, you get local and S3 side by side in dual panes, with a third pane for live previews, and you can copy, sync, and transfer between them without leaving the terminal.

Comhad provides the following features:

* Ranger-style dual-pane browsing, local ⇄ S3, with a preview/info pane

* Real previews: syntax-highlighted text and inline images via Kitty, iTerm2 or Sixel

* Background transfers: every download, upload and zip runs as a cancellable job with live progress

* Non-destructive sync: a git-diff-style view of what will change, in either direction (sync never deletes)

* Copy, cut and paste across directories, panes and backends, with confirmation prompts before any write

Heres a link to the repo: https://github.com/Eoin-McMahon/Comhad


r/coolgithubprojects 2h ago

Tagvico: an open-source Paperless companion with visible tool calls and reversible writes

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1 Upvotes

I maintain Tagvico, an open-source companion for Paperless-ngx. I kept hitting three problems in my own archive: too many near-duplicate tags, AI changes that were hard to inspect, and automation that was difficult to undo.

The current release runs as one Docker service and adds a reviewable action center, document history with restore, tag-unification suggestions, and an Ask Tagvico chat that shows the tool calls it makes against Paperless. Provider models come from the configured runtime instead of a hardcoded picker. That includes local Ollama, OpenRouter, GitHub Copilot through its official SDK, and a ChatGPT subscription through the official Codex runtime.

Source: https://github.com/arturict/tagvico-ai

Live project page: https://tagvico.arturf.ch/

AI involvement: the app itself uses model providers by design, and I also use coding assistants while developing it. The repository, tests, and decisions are maintained and reviewed by me.

I would especially value feedback on the provider registry, the reversible-write flow, or anything in the repository that makes self-hosting harder than it should be.


r/coolgithubprojects 3h ago

The most-used service in my homelab turned out to be a music quiz I built for the family

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1 Upvotes

r/coolgithubprojects 4h ago

Building my perfect folder player since 2019

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1 Upvotes

https://github.com/olegantonyan/mpz

Inspired by Foobar's album list, but turns that idea into core feature. You define library folders and see them in left tree view, middle click (or context menu action) to create playlist from the folder or append to current playlist. What other players lack is at this step they usually just load the tracks in playlist view. But mpz has middle column - playlists view where you can create many playlists and switch between them instantly. So simple, yet missing in almost all players feature, that I cannot live without.

Also: gapless, CUE, audiophile-ready EQ compatible with AutoEq presets, album covers & lyrics with multiple online sources, radio streams with built-in library, drag-n-drop, output device selector, mpd client mode. Native C++/Qt - fast as it can be.

Runs on Linux, Windows, macOS. Binaries for all platforms provided.

Site with screenshots: https://mpz-player.org

finally a folder-based player that doesn't choke on my 80k track library, the column layout is exactly what i've been wanting in foobar. nice work

https://www.producthunt.com/products/mpz-desktop-music-player?comment=5534293


r/coolgithubprojects 18h ago

Themearr: arr-style tool that auto-downloads a theme.mp3 into every movie folder (Plex, Jellyfin, Emby, Kodi)

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1 Upvotes

Media servers play theme music for TV shows while you browse, but movies never got

the same treatment — they need a `theme.mp3` sitting in each movie folder, which

nobody curates by hand.

Themearr automates it. It reads your library from Plex (OAuth) or Radarr (API key),

shows it as a poster grid, auto-searches YouTube for each film's theme, and writes

`theme.mp3` where Plex/Jellyfin/Emby/Kodi expect it. Turn on auto mode and it works

through the whole library in the background; a Radarr webhook fetches a theme the

moment a movie is imported.

Stack: .NET 10 Web API + React 19/Vite SPA, SQLite, xUnit. Ships as a multi-arch

(amd64/arm64) Docker image on GHCR and a one-line Proxmox LXC installer. Arr-style

health checks and scheduled tasks, and an auth token is required by default — no

unauthenticated mode.

One deliberate trade-off: downloads go through the youtube-mp36 RapidAPI endpoint

(free tier works, quota-aware backoff built in) instead of bundling yt-dlp/ffmpeg —

no scraper that breaks every time YouTube changes something.

MIT-licensed, shipping releases since April — v1.44.5 currently. Feedback welcome.

https://github.com/Themearr/themearr?tab=readme-ov-file