Nationstates (2)

[I am nobody]

The original gave you a set amount of issues per day and you had to decide on what to do about each. Then it calculated your economy, population and government type based on what you chose.

This one is sort of along the same lines, but with a lot more detail. You can trade and communicate with other players, and a war option is in the works.

NationStates 2

(it's been very popular so far, so you may get a message telling you to refresh the page when you click that)