The US distributes more foreign aid than any other country in the world. Of course, the purpose of this aid can be quite controversial. Use this viz to see the trend in US aid for any country or category for which you have an interest.
The powerful part of this app is that you can select which year and type of aid you want to look at using the filters. You can also click on a country to see a detailed history in the time series’ below. I find it interesting to click through the year slider. After the Marshall plan concluded in the late forties, the vast majority of aid was redirected to the Middle East and Asia where is has stayed.