As for micro producing countries i know of UK, France, Holland, Denmark, Germany, Italy, Argentina, Switzerland, Austria, Spain, Portugal (I think I recall a Potugoose), Yugoslavia (Fiat 500s and 600s under the Yugo and Zastava names), Czechoslovakia, Yugoslavia, Hungary, Romania, Greece.
I do not know if any were made in Belgium, Luxembourg, Lichtenstein, Norway, Finland, Sweden, Andora, Malta, Cyprus, Latvia, Lithuania or Estonia.
Argentina has clearly gate-crashed the above list, and can drive off in its Dinarg, and Tango elsewhere.