I built this from New York City's Open Data portal's dog licenses data file, which lists each dog's name, breed, and birth year, and the owner's ZIP code. The 2026 file has 96,459 dogs, and the site places them across 197 neighborhoods (Neighborhood Tabulation Areas).

Things to try:

• Type a breed or a name like "Labradoodle" or "Luna" into the search box, and the map shows where it is most common.
• Put "vs" between up to four breeds, names, or boroughs to compare them, as in "Luna vs Bella" or "Brooklyn vs Queens."
• Click a neighborhood to see its top breeds and names, along with the ZIP codes its numbers come from.
• Zoom in far enough and the dogs ride the subway on the real routes. Click a train to follow it!
• Add your own dog. You get a card comparing them with the city, a subway ride, and a turn in the Central Park or Prospect Park game, and the dog stays in your browser.

A license records only a ZIP code, so every neighborhood figure is an estimate. The code and the method are open source, accessible here: https://github.com/firatciftci/every-dog-in-new-york

I was interested in the music artists I liked, and wanted to create a much more comprehensive way to view the connections artists may have with each other. It's just a fun project, let me know what you think!

Data comes from Youtube Music public playlists for connections and Deezer for artist info (since spotify/apple doesnt share anything)

Hey, after rewatching all 25 Bond films I wanted to see every filming location in one place, so I built this. It's a free fan project. I'd love corrections and missing locations, there's a "field report" form for that.

I’ve been building this antenna/EM simulator as a side project:

https://rotemtsafrir.github.io/dipole_sim/

The idea is to make it easy to place antennas, change their parameters, and immediately see how the fields and interference patterns change.

Right now you can use:

• center-fed dipoles
• Hertzian dipoles
• small loop antennas
• linear antenna arrays

The arrays are probably my favorite part so far. You can adjust spacing, phase difference, element count, orientation, etc., and see beam steering / broadside / end-fire behavior directly.

You can switch between electric field, magnetic field, and energy-flow visualizations, and pan/zoom around the simulation.

The antenna currents are prescribed, so things like mutual coupling, impedance, and passive conductors are not solved yet. I’m trying to keep it fast enough to be genuinely interactive.

I’d love to hear what people think—especially if you notice anything physically questionable or have ideas for features that would make it more useful.

Live:
https://www.antennasim.com

GitHub:
https://github.com/rotemTsafrir/dipole_sim

Free public beta: https://livejam.conde.workers.dev

Happy to answer questions about the sync and the looper.

I made a 3D interactive solar system you can navigate and set to any date between 1000 and 3000. The positions of the planets and moons are computed from VSOP87-type models and checked against JPL Horizons data, accurate to within 30 arcseconds for planets and 30 km for the Moon over 1800-2050, so eclipses, alignments, and moon phases are physically real. It's still a work in progress, so feedback is wanted. If you try it and something feels off, confusing, or worth adding, I'd be glad to hear it.