With the exception of the normalize, I wrote all of the code you see here, by hand, using Visual Studio Code. Previous versions were built with Sublime Text or notepad.
This site was built using Gulp, Assemble.io (which includes some Handlebars), and spare time.
You can see the source code for this site on Github .
Most icons come from Simple Icons. The JSFiddle logo comes from SVG Repo.
The font is Helvetica. It is being served by your computer.