Google Open Source - What's new in Apache Iceberg v3
https://opensource.googleblog.com/2025/08/whats-new-in-iceberg-v3.html

https://redd.it/1mnglh1
@r_opensource

Stop using github - GitHub is no longer independent at Microsoft after CEO resignation
https://www.theverge.com/news/757461/microsoft-github-thomas-dohmke-resignation-coreai-team-transition

https://redd.it/1mniiyz
@r_opensource

Open sourced my daily mini dev utilities - Feel free to contribute ✌️

I built myself a collection of mini dev utilities for stuff I do daily - JSON formatting, Base64 encoding, URL encoding, hash generation, UUIDs. Planning to extend it further.

Made it a native Mac menu bar app so it's always accessible. Since it's been useful for my workflow, decided to open source it.

Current tools:

* JSON formatter/validator with error highlighting
* Base64 encoder/decoder
* URL encoder/decoder
* Hash generators (MD5/SHA1/SHA256)
* UUID generator with bulk options

Repo: [https://github.com/dilee/zen-dev-toolkit](https://github.com/dilee/zen-dev-toolkit)

All offline, no tracking, built with SwiftUI. Planning to open source more advanced tools I'm building too. Feel free to contribute ✌️

https://redd.it/1mnlby0
@r_opensource

Menstrudel- Private, offline and open source period tracking/prediction app

Hi all! I wanted to spread the word about a small project I have been working on.

Menstrudel is a free open source period tracking and prediction app that is designed to work completly offline.

Built with Flutter, the current release is available for Android (Not yet released to playstore) as an APK download from the releases page. Playstore release is in the pipeline as I learn how. Currently its set for internal testing but not for general downloads.

This whole thing started with a conversation with my girlfriend when she mentioned that there are not many free/private period apps designed with women in mind.

There is a lot to be done still, but the basics are functional! Please feel free to check out the GitHub and give it a go - let me know of any thoughts :)

https://redd.it/1mnn9nu
@r_opensource

How does one start an open source project?

I recently created a 100% offline budgeting app using AI. I had a basic version running in my terminal, but my girlfriend and brother were interested in it, so I spent the summer "vibe coding" this full app for them. As a self-taught coder, I've learned a ton about how technology works and now understand that no app is ever truly finished. "Vibe coding" has many issues, from potential security vulnerabilities to unstable code that will eventually break. While I've done my best to ensure the app is secure and there's no data leakage, I'm not a professional and I recognize how much I don't know.
Initially, I was just going to scrap the project and move on.

However, when I tried to go back to spreadsheets or other subnoscription based tools, I realized how much I prefer my app. It makes budgeting simple, is completely offline, and has no subnoscription fees. It just works the way I want it to, and I love it.
Unfortunately, as a school starting again I don't have the time or energy to continue learning to code and maintain it. So, I was wondering if I could release this app as open source. My hope is to either raise money to hire a developer to build it out properly or, if the community likes the idea, inspire others to contribute and help it grow.

TL;DR: I created a 100% offline, "vibe coded" budgeting app that I really believe in, but I lack the time to maintain it and fix Ai coding issues. To give the app a chance, I want to release it as an open source project to raise money to hire a developer or invite the community to help. How would you go about releasing this open source?


https://redd.it/1mnozdf
@r_opensource

Spreadsheet Application for Financial Modeling

I'm looking for recommendations on the best open source spreadsheet software that allows for robust financial modeling, specifically with sensitivity and scenario analysis capabilities. I'm aiming to find a strong alternative to Excel to make a permanent switch.

So far, I've tried LibreOffice Calc, but I'm not entirely convinced by its performance and haven't found a good extension for scenario analysis. I'm curious if anyone here has experience with Grist or OpenOffice Calc and could share their thoughts.

I have experience with Python, so Grist makes a compelling option, however this makes collaboration with others a bit hard (for people who are not familiar with programming languages in general)

Some of specific points I'm interested in:

Availability and quality of extensions or plugins for financial modeling.

Scenario and sensivity analysis.

Extensions or prebuilt formulas for depreciation (I sometimes calculate monthly depreciation values)

If you have any other recommendations beyond Grist and OpenOffice Calc, I'd love to hear them as well. Any insights or personal experiences would be greatly appreciated.

Thanks in advance for your help

https://redd.it/1mnolas
@r_opensource

EU Commission Reactivates Bug Bounties
https://www.i-programmer.info/news/136-open-source/18239-eu-commission-reactivates-bug-bounties-.html

https://redd.it/1mnqogc
@r_opensource

OSS LLMuxer — cost-aware LLM model selector (MIT). Help us add datasets & caching.

Small MIT-licensed tool to pick the lowest-cost model that keeps your classification quality. Python, OpenRouter.

Contrib guide: CONTRIBUTING.md in repo.

Repo: https://github.com/mihirahuja1/llmuxer
Demo Colab + benchmark noscript included.

https://redd.it/1mo0906
@r_opensource

Linux is at the tipping point and it just needs the right push :)

I have been following Linux on the side lines over years, the last couple of years I've been more engaged, it had become better, I have been running an Alpine server for more than a year, occasionally used a Qubes OS laptop and had a few Linux VMs. Nobara is what changed the game for me, now I'm converting 100% to Linux, 99% of what I want to do I can do in Linux now and it's easy.

I still don't think Linux is a drop in replacement for Windows, but I think we're close and what is needed is really more commercial support for Linux, more hardware and app support from commercial entities. Microsoft forced steam to think Linux and that has been really good for Linux. AMD has been open to Linux and that has been really good too. The more we get on our team, the better Linux will work.

Right now I think Linux is good enough for many and there is enough consumer irritation about Windows/Microsoft/BillGates/USA e.t.c. to move a lot of people in the direction of Linux. We even occasionally see gaming benchmarks where Linux does better than Windows in frame rates, which for sure motivates some hardcore gamers to move.

Sure, there will be issues, there will be some that get burnt, there will be frustrations on the newbies side and there will be some that would like more peace in the community, but isn't it as a whole for Linux better that we move as many over to Linux as possible? Better app selection? Better hardware support?

Right now, I think Linux needs open source marketing, we need to become good at making commercials the way the community made operating systems. We need to show what open and honest marketing looks like. We have video tools in Linux, we should show off what we can do with our tools in Linux, what great commercials we can make with Linux and just let diversity happen, let the best commercial survive and go viral.

Let's get every country in the world to do Like Norway, let's get to 20% desktop market share in all the other countries too!

https://gs.statcounter.com/os-market-share/desktop/norway/#monthly-200901-202507

https://redd.it/1mo07t8
@r_opensource

Pixel art styled components

Hello guys,

(I have already posted this once before but I made an important update.)

For those who don't know, I would like to show you my side-project, a pixel art styled components library built on top of shadcn.

It now uses the Registry flow provided by shadcn instead of external downloadable package, so every component can be imported in your project using a CLI command, no package download required.

https://www.pixelactui.com/https://github.com/pixelact-ui/pixelact-ui

https://redd.it/1mo2u2h
@r_opensource

Tangled: a code collaboration platform built on the AT Protocol
https://tangled.sh/@tangled.sh/core

https://redd.it/1mo2aes
@r_opensource

Introducing Diffalyze: A New Open-Source Text Diff Tool by a DevOps Enthusiast

Hi!

I’m a DevOps engineer with a deep interest in finding elegant and efficient solutions for everyday technical problems. Over the years, I’ve frequently found myself comparing logs, configuration files, and noscripts — which led me to build something I’d like to share with this community.

That project is **Diffalyze**, an open-source tool designed to compare and merge text documents directly in the browser with speed, clarity, and a modern interface. You can explore the code here: [github.com/joseangel-romero/Diffalyze](https://github.com/joseangel-romero/Diffalyze).

# Key Features of Diffalyze:

* **Efficient diffing with the Myers O(ND) algorithm** for optimal comparison performance.
* Comparison at multiple levels: lines, words, characters, and even intelligent detection of moved blocks.
* A clean and responsive UI: side-by-side or unified views, real-time syntax highlighting (over 50 languages), color themes including dark mode, and internationalization with automatic language detection.
* Fully client-side processing using Web Workers (to keep the UI responsive), local history stored in IndexedDB, and strong security measures (input sanitization, protection against ReDoS vulnerabilities).

# Current Capabilities:

* Undo/redo support (history of up to 20 actions)
* Advanced search with regex, file drag-and-drop, mobile-friendly design, and more.

# What’s on the Roadmap:

* Three-way merge support — particularly helpful for resolving merge conflicts.
* Plugin system to customize diff algorithms.
* Real-time collaborative editing and sharing diff views via URL.
* API support, theme editing, Git integration, folder comparison, and potential extensions to diff PDFs or images.

Diffalyze is released under the **GPL-3.0 license**, meaning it’s completely free to use, modify, and distribute.

# How You Can Help:

* Try the live version at [diffalyze.com](http://diffalyze.com) or run it locally by cloning the repo.
* Report bugs, suggest improvements, or contribute translations, UI enhancements, test coverage, and more.
* Even small contributions are welcome — whether improving the interface, adding a tweak, or just submitting feedback.

I’m excited to contribute to the open-source community and would be grateful for any input, suggestions, or collaboration offers.

Thank you for reading!

https://redd.it/1mo3wbu
@r_opensource

Would it be possible to create an alternative to Spotify?

With the recent news that Spotify CEO Daniel Ek has invested in an AI weapons company, I feel it's time there was something to really rival Spotify and pay artists what they deserve. Bearing in mind artists get about. $0.0003 per stream while he pays himself $350 million per year, something is very wrong.

Putting aside the logistics of getting the music industry on side, would it be possible to create a rival in the way that open source software works? Lots of people working together to keep it running, each being paid, without one person at the top taking all the money.

Full disclosure. I am not a developer so have very little knowledge in this field but just fed up with these tech bro millionaires. It's time for a change.

https://redd.it/1mo400v
@r_opensource

Android reels/movie downloader?

Would appreciate very much recommendations for an Android reels/movie downloader, Floss/Open Source ofc. Thanks.

https://redd.it/1mo4x7q
@r_opensource

Tracking and visualising repository trends, new update with Reddit mentions & release timelines

A while ago, I shared [my GitHub History project](https://www.reddit.com/r/opensource/comments/17g30ew/introducing_my_github_stars_history_project/) here.
It’s a personal project that tracks and visualises the daily stars (and other metrics like PRs, forks...) history of GitHub repositories, aiming to give more context to growth trends over time.

I hadn’t posted about new releases since that first post, but with the recent **v0.0.7** update, I thought it might be worth sharing a quick highlight of some new features:

* **Reddit mentions**: The project now lists [repositories recently discussed in this subreddit ](https://emanuelef.github.io/daily-stars-explorer/#/featured?source=reddit&sort=points&dir=desc&page=0&rows=10)(and links to the discussions).
* **Releases feed in stars timeline:** You can now see a project’s releases plotted alongside its star history.
* **Mobile-friendly access:** Added a button to quickly switch to a mobile-optimised version of the site.

Repo link: [https://github.com/emanuelef/daily-stars-explorer](https://github.com/emanuelef/daily-stars-explorer)

As always, it’s still a work in progress, feedback and ideas are welcome.

*PS:* While stars don’t necessarily mean a repo is good or useful, I think they can still show some interesting trends. Personally, I often star a project just to show the maintainer my appreciation.

https://redd.it/1mo79c8
@r_opensource

Koncentro: A productivity app with a Pomodoro timer with integrated website blocker

Koncentro is a productivity app built with Qt that combines timeboxing with the Pomodoro technique and an integrated website blocker.

The website blocker supports both a blocklist (sites you want to block) and an allowlist (only specific sites are allowed). You can separate work and personal goals using workspaces. Each workspace has its own set of settings, website blocker configuration, and tasks.

Koncentro is available on Winget: winget install --id=BishwaSaha.Koncentro -e.
For Linux, Koncentro is available as a flatpak: flatpak install flathub com.bishwasaha.Koncentro. Deb and RPM packages are also available on GitHub Releases.
DMGs for MacOS can be downloaded from Github Releases

Github Repo: Koncentro

Screenshots are available here

Note: Windows SmartScreen might prevent the installer from starting because the app isn’t code signed yet. As code signing certificates cost money, this step hasn’t been done yet. You can still run it by choosing “More info” → “Run anyway.”


https://redd.it/1mo9e7k
@r_opensource

Project Shelf - A project details keeper

Hey 👋,

Throughout my dev journey I have created multiple small/medium apps and after a while I forget where they were hosted, or where I bought the domains(these are just 2 examples). I used Notion for a while to keep track of them but I don't really like it.

I created a small app that keeps track of projects, and after I made it Docker-ready, I just wanted to share it here. Maybe it will help someone else.

The app is called Project Shelf.

https://ibb.co/1tC6nTP5

What it actually does:

  \- Track your projects with simple statuses (Planning → In Progress → Completed)

  \- Multi-user support (great for teams or families with multiple devs)

  \- Clean, modern interface that doesn't get in the way

  \- Built-in admin panel for user management

Use Case

Imagine you have several personal projects – a small web app, a home automation noscript, a game you're tinkering with. Project Shelf allows you to create an entry for each, track its current status (e.g., "Planning," "In Progress," "Completed"), add notes about its hosting, domain, key technologies, or any other important details you want to remember. It's your centralized dashboard to quickly recall where everything is and what its current state is.

Github: https://github.com/LaszloRobert/projectshelf

Tech stack: Next.js, TypeScript, Tailwind CSS, Prisma, SQLite

I'm really keen to get your feedback, suggestions, and even contributions! What do you think? Are there any features you'd love to see?

Thanks!

https://redd.it/1moafyg
@r_opensource

Supabase JS playground

Introducing Supabase JS Playground 🪄

A free and open source tool to run and debug your Supabase JS client code with real data - no setup, no boilerplate.

Inspired by the SQL playground in the Supabase dashboard, but built for testing Supabase JS client queries directly. Quickly check what your JS client code is going to return, without needing to setup a full fledged app.

Example:

You have this `await supabase.from('todos').select()` in your app, you can navigate to the playground, and put in this snippet in the Database Query tab and run the query. You will see what this snippet returns when using the `Anon` key. You can add your service key and toggle to use it and see what using a service key returns (Quite useful when working in the backend). You can also impersonate a user, by clicking on the impersonate user button and providing a user's email. Now the same query will return the data that this user can see.

Here's why it's useful:

✅ Instantly test your client code

🔐 Check what anon & service key can access

👤 Impersonate users to debug RLS policies and to see what data can they access

🧠 Call your RPC functions directly

🔑 Supports legacy and new API keys

🛡️Note: Supabase API url and keys are stored in the browsers local storage. No data is stored/sent to our server.

Try it out here - https://supabase-js-playground.vercel.app/
Source code - https://github.com/Dineshs91/supabase-js-playground

Give it a star on GitHub if you like it.

https://redd.it/1moadpz
@r_opensource

Opensource Music Player download for linux and windows

A new opensource music player is available to download at sourceforge.

It started as an attempt to make a random music player that never stops playing music like 5 years ago, i started making the project in c# but now it's available in python only.

For Linux and Windows, but the linux install got way bigger than the windows version dont really know why .

https://sourceforge.net/projects/random-jukebox/

https://redd.it/1mo8b6t
@r_opensource

Released my first project on GitHub!

The other day I did a bit of vibe-coding and put together a simple timer for automatically shutting down the PC. Minimalistic, nothing extra, works on Windows. Might come in handy for work or gaming, so you don’t forget to power off your machine in time.

https://github.com/pukdev/shutdown-timer

https://redd.it/1moix69
@r_opensource

Zathura Liberation Day: Utility Plugin Support

# A major breakthrough for Zathura customization, the "Zathura Liberation Day" patch introduces a powerful utility plugin system. This enables developers to create plugins that register new utility functions, extending Zathura's core capabilities. As part of this break from the old document class, a new TTS (Text-to-Speech) API is now available, allowing for the creation of plugins that can read documents aloud.

This functionality is currently available as a patch. You can find more details in the Zathura Pull Request #780.

Download Patch

https://redd.it/1mok9kr
@r_opensource