One is Morocco, which may be the first time an Arab country participated since 1935. They sent one athlete, a swimmer.
Turkey, on the other hand, sent 48 athletes, in swimming, futsal, basketball, table tennis, track & field, tennis and archery.
Other countries sending delegations where one would not expect to find Jewish athletes include Mauritius (with 4 athletes), Botswana, Guinea-Bissau (10 athletes), and Cuba with 55 participants.
UPDATE: Uzbekistan and Kyrgyzstan also have delegations (h/t Jean V)