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Posted by david927 6/29/2025

Ask HN: What Are You Working On? (June 2025)

What are you working on? Any new ideas which you're thinking about?
439 points | 1401 commentspage 17
bytecauldron 6/29/2025|
I'm currently developing a middleware that connects Nvidia PhysX to GameMaker. There's still a lot of work left but I have most features working in some capacity. Dynamic and static actors, primitive/convex/triangulated shapes, joints, character controllers, GPU accelerated PBD particles and deformables, etc. GameMaker is primarily a 2D engine and offers limited options for 3D, but it is possible if you know how to use vertex buffers. I'll probably post it here once it's a little farther along, but I'm pretty proud of my progress so far. I'm hoping I can use it to support myself in some way, but there's a lot of anxiety in selling a niche project like this.
reaperducer 6/29/2025||
On a whim, I bought a pack of playing cards at the supermarket. Now I'm learning how to play card games.

The card maker has its own web site with the rules for playing all kinds of card games, and it's filterable by number of players, including many games for one person.

mabil 6/30/2025|
What's the name of the game?
JusticeJuice 6/29/2025||
I wanted to learn a bit about backend development, so I've been building my own version of soundcloud with supabase. Main thing I've learnt so far, auth is flipping complicated. But it's been really fun! The audio compression is done clientside with ffmpeg and WASM, I'm pretty pleased with that approach. Everything is pretty busted atm, but I'm trying to get to a 'walking skeleton' then polish. I've been devlogging the process as I go for fun.

https://cassette.world/

https://www.youtube.com/watch?v=mwpg34oLvwU

wingdroid 6/30/2025||
Building TenantFit: https://tenantfit.mtxvp.com/, a lightweight tool to help small landlords pre-screen rental applicants.

When you post a listing (e.g., on Facebook, Kijiji), you get tons of “Is this still available?” messages — but no useful info. TenantFit lets landlords collect basic answers (income range, pets, lifestyle) via a public link, then ranks responses to highlight promising leads.

No accounts or sensitive info collected from tenants (landlord does not even see candidate email until they reply), just a quick pre-screen before deeper screening to save time.

LouDNL 6/30/2025||
This month I released USBSID-Pico v1.3 pcb via PCBWay and Retro8BitStore and yesterday firmware version v0.5.0-BETA. The new pcb now supports mixed MOS6581 / MOS8580 chips (voltage) at the same time and new firmware brings a lot of tweaks and improvements making Commodore64 digitunes play better on Windows.

USBSID-Pico is a RPi Pico (RP2040/W RP2350/W) based board for interfacing one or two MOS SID chips and/or hardware SID emulators over (WEB)USB with your computer, phone, ASID supporting player or USB midi controller.

More info at https://github.com/LouDnl/USBSID-Pico

sgt 6/30/2025|
I just watched https://www.youtube.com/watch?v=nh0SxO1y6I0

Well done. This is really cool.

LouDFPV 7/1/2025||
Thank you!
bastienbeurier 7/11/2025||
https://gogogame.org

A free app to find and post local games — sports, board games, etc. (solo side project)

cbolanos79 7/2/2025||
Currently, in a side project to keep track of pricing in the supermarkets, as since the start of the war of Ukraine, the prices have raised, event skyrocketed in some cases, without any real explanation. In some cases, I've seen how a product has raised up to 1€ in some months. The way to keep the pricing changes is to take a picture of a supermarket receipt, store the information, and calculate the pricing diff for each article. For extracting the information, I use Textract from AWS, as it fits my needs, however, it could be possible to replace it with any other OCR which can extract structured information. My purpose is to improve the project gradually and add statistical information, like charts showing the pricing changes along the time, show the most bought products in a period of time, etc

As the project relies on AWS service, I have decided to not publish a free demo, as it would be exposed to abuse by sending all kind of images, not to talk about crazy billing. However, here is a screenshot on how does it display the receipt details:

https://ibb.co/pv2ksRhH

There is a raise on one article, and a down on some others

The project is built using Ruby on Rails and runs on docker. It is light enough to run on a cheap VPS.

Feel free to take a look on it: https://gitlab.com/cbolanos79/sbt_rails

Any constructive opinion/collaboration is welcome :)

lappet 7/2/2025|
hey there, I spent some time working on something very similar, but I am based in the US! I was able to import receipts from Safeway & Costco here, using private APIs. But since stores here don't really support OAuth, and using a private API may not be the best long term approach, I paused my effort. I would love to chat if you are interested. I used react to build a prototype.
vinhnx 6/30/2025||
I'm putting the finishing touches on VT[0] - a minimal AI chat client focused on privacy. No tracking, clean interface, with support for deep research, web search grounding, tool calls, and RAG... and more.

The code is all open source on GitHub[1]. Really close to shipping now - hope to share launch details soon.

These monthly HN threads have been great motivation for me to keep building consistently. Thanks everyone!

[0]: https://twitter.com/vtdotai

[1]: https://github.com/vinhnx/vtchat

vinhnx 7/6/2025|
The VT app is now live at https://vtchat.io.vn/
mongoosled 6/30/2025||
https://pickyskincare.com - a tool that lets you find skin care products based on the ingredients you want and don't want in it. The main use case is for finding cheaper versions of a product you already like, or one without things you're allergic or sensitive to.

It's written in elixir using Phoenix live views. There's almost no custom Javascript outside of what that framework gives. First load may take a while because it's the cheapest tier of fly.io and boot loads all known ingredients and products in to memory.

alexnastase 6/30/2025|
I'm working on an online photo gallery platform for professional photographers. The MVP is ready, but I'm also using the opportunity to learn more about SEO, marketing, and communication. This is the URL: https://picstack.com

One interesting lesson is to see the effort involved in acquiring new customers and setting up funnels, especially when bootstrapping with a small budget. Sometimes, as developers, we are in our bubbles and don't realize how much skill one needs to figure out the customer acquisition domain.

carlosjobim 6/30/2025|
Congratulations on making an excellent project. It seems to be exactly what professional photographers need. I wish you good luck!
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