What did the Old World give the New World?

Corn,many many varieties of what are know as common beans,lima,red.black,pinto,navy,etc. almost all beans except soy,peas,garbanzos,sweet potatoes ,white potatoes,most varieties of Squash and all pumpkins,can you imagine a world without potatoes and sweet potatoes,Oranges and lemons and limes,guava,papiya?,amaranth,quinoa,just to name a few.