Short answers, pulled from the story.
The United States, United Kingdom, France, and Soviet Union agreed that no money would change hands directly between nations. Instead they demanded physical assets from German industry including machinery and labor through the Inter-Allied Reparations Agency.
German factories provided millions of tons of steel coal and other industrial products to the Allies after the war ended. The Soviet Zone reduced double-tracked rail lines to single track while railway electrification systems were dismantled across occupied territories.
On the 23rd of August 1953 the People's Republic of Poland announced it would waive further war reparations from East Germany. This decision took effect on the 1st of January 1954 under pressure from the Soviet Union.
Initial reparations for Greece totaled 7.181 billion dollars but actual receipts reached only about 25 million dollars. Eighty percent of Greek industry was destroyed during Nazi occupation while infrastructure suffered 28% damage according to postwar assessments.
West Germany paid approximately 14 billion dollars to Israel until 1987 for confiscated Jewish property. These payments covered forced labor and persecution under Nuremberg laws plus additional compensation from German companies exploiting workers during the war years.