Here is map by UNCTAD prepared in 2004 of the 50 least developed countries: http://archive.unctad.org/Templates/webflyer.asp?docid=5681&intItemID=2807&lang=1 And here is a listing of 49 least developed countries by WMO http://www.wmo.int/pages/themes/ldcs/list_en.html
Mainly about New York and Countries of the World. Variety of information and tips