Livre d'Or

https://terraforming-mars.herokuapp.com/, although I ended up installing our own copy after that server disappeared in the middle of a game and I found the admonition on https://github.com/bafolts/terraforming-mars#Demo. Email me at the address on my profile if you decide you'd like to use my installation (I didn't want to have the whole internet descend on it, partly because it's running behind my ADSL and partly because I didn't want to get in trouble in case the game publishers decide they don't like the unofficial version existing, but I'm happy for people I know IRL to use it).