Vercel: Geist Sans, Geist Mono
https://vercel.com/font

Github: Mona Sans, Hubot Sans
https://github.com/mona-sans
https://fonts.google.com/?query=GitHub

JetBrains: JetBrains Mono
https://www.jetbrains.com/lp/mono/
https://fonts.google.com/?query=JetBrains

Ubuntu: Ubuntu, Ubuntu Monospace
https://design.ubuntu.com/font