MIMF

Here is designer for making spherical resonators to resonate a given frequency.
After creating, there is an option to download the design in a variety
of formats such as a stl file for 3d printing.

http://spheres.ml

This seems down at the moment.

sorry, yes it is till the first of the month.
bill priorities...

Sure thing - just wanted to tell you in case you didn’t know.

I don’t know what your back end requirements are, but could you run it on Heroku’s free hobby tier?

Cheers!

the site is back up.
i rent a vps (virtual private server).
actually pretty cool they are.
i remember when i first tried one.
i had gotten frustrated with commercial hosters (go-daddy,etc.)
because of their restrictions. so i tried one for a month. it was like 6 bucks.
wasn't sure what to expect. with commercial hosters you get a control panel gui for your website
what i got was login credentials to a commandline linux os (centos) over ssh and the ability to sftp and that was about it.
lol. i was like, this ain't like go-daddy. doh!
a little research showed me i had to install a web control panel. i use centos web panel. (no relation)
it was easy. just type a download address into the commandline to download a script and then run it.
when it was done i had a gui where i can easily host domains/web sites.
now i'm the daddy...lol