Many foreign and international government organizations produce documentary material on World War I which is freely accessible on the Internet.
Examples include:
Australia
Australian Army History Unit World War I
Australian Imperial Force (AIF) Project (Australian Anzacs in the Great War 1914-1918 Courtesy: University of New South Wales)
Australia National Archives Military History
Andrew Fisher (Prime Minister) Papers-National Archives of Australia
William Morris Hughes (Prime Minister) Papers-National Archives of Australia
Australian War Memorial First World War Centenary
Official Histories World War I
Gallipoli and the Anzacs (Courtesy: Australia Dept. of Veterans Affairs)
Official Yearbook of the Commonwealth of Australia
Parliamentary Debates (Hansard)
Austria
Bulgaria
National Library Historical Archive Collection
Canada
Canadian War Museum Canada and the First World War
Dept. of National Defence and Canadian Armed Forces
First World War Official Histories
Library and Archives Canada Military and Peacekeeping
Parliament House of Commons Debates (Hansard)
Robert Borden Biography (Dictionary of Canadian Biography-Canada's Prime Minister During WWI)
Robert Borden Papers Finding Aid (University of Toronto Library)
France
Armistice Museum (Compiegne, France)
Defense Ministry Historical Archives
Official Bulletin Ministry of War (1914-1916)
(In French)
Official Journal
(In French-Contains government policy announcements)
Germany
Germany Foreign Office (Most in German)
Military Archives (in German)
Statistical Yearbook (In German)
Hungary
National Archives Holdings Descriptions
Inter-Allied Rhineland High Commission 1918-1930
Inter-Allied Rhineland High Commission
Italy
Central State Archives
Foreign Ministry Diplomatic History Archive
League of Nations
Statistical and Disarmament Documents (Courtesy: Northwestern University Library)
New Zealand
New Zealand and the First World War (Produced by New Zealand Ministry for Culture & Heritage)
New Zealand National Archives
New Zealand National War Memorial
New Zealand Official Year Book
William Massey (Prime Minister) Biography
Romania
National Archives
Russia
Russian Federation State Archives
Serbia
National Archives
United Kingdom
Cambridge University First World War
Final Report of the Dardanelles Commission
Imperial War Museum 1st World War Centenary
National Archives
Cabinet Papers 1915-1984
Herbert Henry Asquith Papers Finding Aid (Prime Minister 1908-1916 Courtesy: Bodleian Library Oxford University)
David Lloyd George 2006 BBC4 Documentary
National Museum of the Royal Navy
Oxford University World War I Centenary
Hansard Parliamentary Debates 1803-2004
Measuring Worth (Non-governmental dataset calculator documenting purchasing power of various currencies including U.S. dollar, British pound, and Australian dollar.)
