Sweden, Canada and all countries that fall into that group are capitalist with a touch of socialism (medicare, etc.).

True socialist societies are non-existant; they cannot exist in a competitive world.
(The pueblo Indians of North and Central America, once moderately socialist, have become capitalist-socialist mixed societies).

Communism is non-existant; Cuba has a strong centralized controlled government (directed from the top); North Korea is similar but much more repressive and tightly controlled.