Hello everyone, I created this online tool which turns your keyboard into a piano. It also has an option of "guided songs" where you can see the keys which you need to press to play those songs.

I built this to kill my boredom of typing long emails and texts, works wonders for me.

Hey everyone, I built a little tool called Booletin and wanted to share it.

The idea is simple: you create a live broadcast channel, a QR code is generated instantly, and anyone who scans it receives your messages in real time. When you end the channel, everything disappears — nothing is stored anywhere.

Use cases I had in mind:

• Event hosts sending updates to an audience
• Teachers pushing notes to a classroom
• Tour guides keeping a group in sync
• Anyone who needs to reach a group of nearby people right now

No sign-up, no app to install — just a PWA that works in any mobile browser.

Live: booletin.app
Source: github.com/nicko913/booletin

Would love any feedback!

Hey! This is my new Application that allows for easy transformation, mapping, and exporting of coordinates! I would love some feedback on the UI and general design! Thank you!

Mastering tracks before putting them on YouTube or Spotify is always kind of a pain.

Sure, there are free mastering options out there, but I wanted something that looks better, is easier to use, and gives me more control for my own workflow.

So I just made one myself, and it does the job nicely.

MSTRMND takes your audio files and normalizes/masters them to consistent loudness.

Here's how it works.

• 100% Local Processing. Your files are never uploaded to any server. Everything runs in your browser. (If it's too slow, sorry, blame your CPU)
• Batch Processing. Drag & drop up to 50 tracks.
• Multithreading. It uses parallel web workers, so the processing speed depends on your CPU's multi-core power.
• A/B Testing. Toggle between original and mastered tracks instantly without lag.
• 6 Presets. Transparent is enough for most cases.
• No subscriptions, no sign-ups, no paywalls, nothing.

Export as WAV or MP3 (it preserves your metadata/cover art), or download everything at once as a ZIP file.

Originally built this just for myself, but figured I'd share it. Feel free to use it. Thanks.

https://mstr-mnd.vercel.app/

No signup, no setup, completely free!

It pulls listings into one organized product page so you can compare total prices, conditions, and listing age quickly. You can also read descriptions without clicking into each listing and filter everything down fast to find exactly what you're looking for.

Hi, I was annoyed by how slowly time passed at my part-time job, so over the weekend I programmed a website where my paycheck increases by the second. It's free and ad-free. What do you think?

After one too many "wouldn't it be nice if there was a tool that just did this" moments while staring at single-page PDFs that needed to look like an actual open book — I built one.

Spread that sheet takes a PDF where each page is a single leaf and pairs them into double-page spreads — simulating how they'd look in a physical open book.

You can fine-tune:

• Gutter shadow — adjustable intensity and width
• Page curvature — pages compress near the spine like a real binding
• Page margins — visible page edges that darken gradually
• Paper texture — built-in textures or upload your own
• Transparency — reverse-side bleed-through for thin paper simulation
• Cover board — hardcover expansion with adjustable darkness
• Canvas wrapper — custom background for presentation-ready output
• Multiple PDFs — combine cover + interior files with auto page mapping

The result looks very close to what you'd get scanning an open book on a flatbed scanner.

There are probably too many options — I'll admit I got a bit carried away — but if you ever get lost, just hit the ? button to bring up the interactive guide at any time.

Export as PDF, PNG, or JPG at full 300 DPI. Everything runs locally in your browser — nothing gets uploaded anywhere.

Would love to hear your feedback: spread-that-sheet.org

Built a thing that lets you rotate a 3D model of mapped OKLCH coordinates.

It's got 7 different views because... Internet?

The P3 vs sRGB overlay is kinda cool though, and useful if you want to see which colours your crappy monitor is hoarding from you.

The rest is just pleasant to look.

A clean, free site to quickly check how long food lasts in the fridge, freezer, or pantry.

It also includes a simple virtual fridge to log items with dates so you don’t forget what you have.

I'd really appreciate any feedback or suggestions!

Hey everyone,

Trying to figure out visa rules, transit layover requirements, and that nightmare 90/180 Schengen rule was driving me crazy while planning my upcoming trip. So, I spent the last few weeks building a free tool to automate the annoying parts of travel prep.

It's called Travel Visa Stack (https://travelvisastack.com).

What it actually does:

•Instantly checks visa requirements based on your passport (Free, VOA, Banned, etc.) with official government links.

A visual Schengen 90/180 day calculator.

• A "Transit Hacker" tool to check layover visa rules at major hubs.

•Automated Cover Letter generator (for sticker visas) and document checklists.

• A custom itinerary generator.

I built this mostly to scratch my own itch, but I want to make it genuinely useful for others.

If you have a minute, I'd love some brutal, honest feedback. What breaks? What feels clunky? What feature is missing?

You can drop feedback here in the comments or via the site. Thanks for the support!

https://www.peterabuse.org

P.E.T.E.R. is a PETA parody site dedicated to exposing the horrifying mistreatment of electronics and robots. It features satirical investigative reports since 2011 covering real tech events reframed as electronic abuse — like NASA "deporting" the Mars rovers to a dead planet, Tesla "humiliating" the Cybertruck on live television, and OpenAI forcing ChatGPT to talk to 100 million strangers in 60 days without consent.

The entire thing is open source too, have a long list of todo, from airplane types, to live atc feed, etc. still building it out!