A couple of years ago Cole and I make a simple little drag and drop Catan set we called "foreplay". We made it in LOVE, which at the time seemed like a great move until I grew up a little and realized that Godot was infinitely more usable than LOVE.
Today I've decided to take a crack at making a free Catan clone again, with both 5-6 player expansions and C&K extensions. Again, it will not know the rules, but it will have a better interface than simple Drag and Drop. Think Cockatrice but for Catan.
Target platform is the web, ideally both desktop and mobile.