PlayCatan is the online platform for games by famous game designer Klaus Teuber.
This pnd contains no game data but offers to download the software for you direct from http://www.playcatan.com/
Game requires PlayCatan account to play go to http://www.playcatan.com/ to register your free account.
Game play can be a little laggy but works 100% online against people on Computers.
Can join open games and create them by hiding the options(switches) info in the created game window u can drag the window up to see the buttons at the bottom.
This software was developed with the smallest video setting being 800x600 but it still fits ok.
The only issues I have found due to screen size it is not being able to see the dice as they roll behind your characters head (not much of an issue since the number the dice rolled flashes on the relevant map tile).
Some times trades can be a little awkward but usually go through in the end.