The first item is a postal reply card to be used by "Eastern Workers" or Ostarbeiter. They were basically forced laborers used by Nazi Germany and many came from Ukraine and other occupied areas of Eastern Europe. They had for a time limited rights to mail messages back home using these postal reply cards, but as expected the life of these workers was brutal during and after the war.
More about them here.
http://en.wikipedia.org/wiki/Ost-Arbeiter