The leaders of which organization are shown in the picture?

NAM

The Image shows the founding members of the Non-Alignment Movement.

5 Founders of the Non-Alignment Movement are:

Josip Broz Tito - President of Yugoslavia
Jawaharlal Nehru - Prime Minister of India
Sukarno - President of Indonesia
Gamal Abdel Nasser - President of Egypt
Kwame Nkrumah - Prime Minister and later President of Ghana