I'm super happy for Ngrok, I remember first hearing about it on HN forever ago and immediately loving what it allowed you to do. I've used it multiple times on and off since then and it's the first thing that comes to my mind in the problem space of "need to expose local service temporarily". It appears they are moving more into the Cloudflare Tunnels territory which is pretty dang cool.

I wish I had more of use for Ngrok because my current usage doesn't merit a $20/mo subscription. Recently I ended rolling my own poor-mans-ngrok using Cloudflare Tunnels (needed a static domain to test my Apple Pay implementation and some other domain-verified-only things) and they are really cool but ngrok is way easier to get started with and use.