WTO

The International Monetary Fund (IMF) was created in 1944, with a goal to stabilize exchange rates and supervise the reconstruction of the world's international payment system. It is an international organization that oversees the global financial system by following the macroeconomic policies of its member countries, in particular those with an impact on exchange rates and the balance of payments.

GATT, or the General Agreement on Tariffs and Trade was a treaty, and not an organization. It was the outcome of the failure of negotiating governments to create the International Trade Organization (ITO).