ATP International Series | International Monetary Fund | Society of Jesus | Royal Society | International Red Cross and Red Crescent Movement | ATP International Series Gold | National Geographic Society | International Space Station | Amnesty International | International Olympic Committee | BirdLife International | International Finance Corporation | International Organization for Standardization | International Telecommunication Union | International Criminal Court | American Cancer Society | One Day International | International Nonproprietary Name | International Labour Organization | International Civil Aviation Organization | International Boxing Federation | Toronto International Film Festival | International Atomic Energy Agency | International Maritime Organization | International Development Association | John F. Kennedy International Airport | Los Angeles International Airport | International Bank for Reconstruction and Development | International Court of Justice | International Fund for Agricultural Development |
Eugene Rittich's long association with the Toronto Symphony Youth Orchestra, the National Youth Orchestra and the Faculty of Music at the University of Toronto was honored twice by the International Horn Society in awarding him their Punto Award "in recognition of distinguished contributions and service to the art of horn playing".