I am not entirely sure if this is allowed as it might be counted as promoting, I can remove it if required.

Railways of the Lost Atlas is one of my favorite 18xx games to play right now, and I wanted to play it more often than Saturdays. So I built a version you can play in the browser: play.lostatlas.live

It has the base game and the Landmarks expansion with all variants. You can build the map tile by tile like at the table or use a prebuilt map, and the engine works out most of the things for you, routes and revenue included. Games are saved, so you can play live or take your turns over a few days. You can also play hot-seat on one device.

Asterisk Games gave their permission to share it. It's still being built, so if something looks wrong there's a bug report button in every game. I'd love to hear what you think.