The International Olympic Committee is the guardian of the Olympic Games and the leader of the Olympic Movement.
International World Games Association official site - Learn all about the sports and history of the IWGA and the The World Games | IWGA
The Association of IOC Recognised International Sport Federations (ARISF) is the world authority regrouping all IOC Recognised International Sport Federations.
WADA was established in 1999 as an international independent agency to lead a collaborative worldwide movement for doping-free sport. 
The United Nations Educational, Scientific and Cultural Organization
Since its founding in 1949, the International University Sports Federation is the key driver to expand the role and reach of university sport around the world. 
Under the direction of Paul Rousseau, Secretary General of the “Union Cycliste Internationale”, a permanent bureau of the international sports federations is created 1921.
The International Testing Agency (ITA) is an international organisation constituted as a not-for-profit foundation, based in Lausanne, Switzerland.