I put together a mindless game over the weekend. I haven’t added instructions or optimized it for mobile yet, and may never due to laziness. Click the empty board to make it match the pattern:
Ask HN: What are you working on? (September 2025)
821–830 of 1001 posts
Re: Ask HN: What are you working on? (September 2025)
#822https://github.com/little-book-of/maths/blob/main/books/en-U... I've been working on a book called "The Little Chronicles of Mathematics, Data, and the Mind of Machines", this is a 100 sections journey from counting stones to thinking silicon. This book is more like a storybook for curious builders. I wrote it for people who love see how things connect, how math become language, how data become memory, and how machin…
I skimmed this and it looks like a remarkable work, and clearly you've put a lot of time and love into it. What inspired you? What are your next steps? Also, how do you deal with the disappointment of too few github stars? What is your success criteria?
Re: Ask HN: What are you working on? (September 2025)
#823I've been working on a 3D voxel-based game engine for like 10 years in my spare time. The most recent big job has been to port the world gen and editor to the GPU, which has had some pretty cute knock-on effects. The most interesting is you can hot-reload the world gen shaders and out pop your changes on the screen, like a voxel version of shadertoy. https://github.com/scallyw4g/bonsai I also wrote a metaprogramming…
Cool. Especially love the low dependency approach. Readme says OpenGL 3.3. Are you doing the GPU compute using old-school GPGPU techniques?
Yeah, just render to texture, with one instance of cpu readback (for generating voxel data). There are a couple features I'd like to implement that require 4.3, but I'm pretty committed to the bit at this point. Maybe one day I'll have some optional features.
Re: Ask HN: What are you working on? (September 2025)
#824"Google maps but for old maps": https://pastmaps.com This is a solo startup that I've been working on for 2 years now. It's a labor of love and I'm very lucky and thankful that it's big enough to surprisingly pay all of our bills. Still constantly feeling FOMO over all of my startup buddies working with AI and LLMs while I plug away at old maps and GIS . It gets ~80K MAUs and just slowly and consistently is growing o…
That's pretty cool, I'll definitely check it out. I've also been looking around for old maps like this.
I also started a small free-time project, where users can download maps as wallpapers for free and put them on their walls :]
Re: Ask HN: What are you working on? (September 2025)
#825I've been busily porting my NES game, Tactus, to Windows, Mac, and Linux as a "native" build. It's been fun to consume my own emulator as middleware, and then lightly modify it to support things like a widescreen view, which the original console definitely cannot do. Here's what that looks like:
https://bsky.app/profile/zeta0134.bsky.social/post/3lzclakpp...
Right this second I'm getting the paperwork sorted to start my first business (gulp!) which should then let me get a Steam page set up and start messing around with the Steamworks SDK integrations. Tons more work to do, but it's coming together fast.
Even more exciting, the cartridges are finally working! I can play the game on real hardware. :D It's basically the same game code on both platforms, with the PC build just doing a bit of extra work to signal to its emulator "shell" that it has switched game modes. (This affects the widescreen display.) Real hardware capture here:
https://bsky.app/profile/zeta0134.bsky.social/post/3lysv53qk...
Re: Ask HN: What are you working on? (September 2025)
#826Been working on a simple online radio station player. Very early stages but allows users to search for stations, play them and favourite them. It's up now but still not "prod ready" but feel free to check it out if you like: https://www.radiopuppy.com
Nice app. Can you add a share link for a radio and to categorize them by country and category?
A nitpick: I would prefer the spin loader from visible o the centre of the page.
Re: Ask HN: What are you working on? (September 2025)
#827https://petmoving.site/
A (so far) simple AI assistant to provide help if you're moving with your pets to a different country. I've got a vector db with some US travel documents embedded, parse the question/prompt, and add the relevant context to a standard LLM request.
It also parses the question/prompt and stores move and pet details, so later questions will have context.
Eventually, the idea is to have a full tracker and reminder system... so deadlines, appointments, and documentation can be stored and referenced in a single place.
Re: Ask HN: What are you working on? (September 2025)
#828Jacobin, a JVM for Java 21 written in go Website: https://jacobin.org GitHub: https://github.com/platypusguy/jacobin
Cool! How far are you planning to take it? Interpreted mode only? Or do you plan on going the whole HotSpot nine yards with compiling bytecode down to native code?
Re: Ask HN: What are you working on? (September 2025)
#829I built a free & open-source invoice generator: https://easyinvoicepdf.com/?template=stripe - No sign-up, works entirely in-browser - Live PDF preview + instant download - VAT support (EU-friendly) - Shareable invoice links - Multi-language (10+) & multi-currency - Multiple templates (incl. Stripe-style) - Mobile-friendly GitHub: https://github.com/VladSez/easy-invoice-pdf Would love feedback, contributions, or ideas…
How are you planning to generate revenue? My concern will fully free services is that they often don't exist after 3-4 years. Then I have to find another invoice generator. Sticking to WaveApps for now, but this is looking great actually and I'd consider using it.
It’s completely open-source, so it’s easy to fork and self-host if you want to avoid lock-in. I originally built it for myself and don’t have plans to monetize it. Even if I do in the future, the current version will always stay free and without sign-up. Any monetization would come as a separate pro version with extra features, not by removing what’s already available =)
Re: Ask HN: What are you working on? (September 2025)
#830Microlandia, the brutally honest city building game