I am very interested in the growing amount of radical literature from around the world that is being scanned and digitised. As there are so many and from many different places, I thought it would be useful to make a list. All of those that are included are free to access (there are others that require some form of subscription). If there are any that I have missed or if any links are broken, do let me know, either by commenting below or sending me an email.
Edit (Feb 2022): I have added categories of the list below for ease of finding the relevant collections.
Afghanistan
Kabul Times (English language newspaper of Afghan Government, including after People’s Democratic Party of Afghanistan took power)
Albania
Party of Labour of Albania archive
Anarchism
Emma Goldman papers (from University of Berkeley)
Freedom newspaper (London)
Library of the Free (German anarchist focus)
LIDIAP (List of Digitised Anarchist Periodicals)
Pierre Ramus papers (via IISH)
Rudolf Rocker Papers (via IISH)
Spunk Library (1990s anarchism)
Anti-apartheid
African Activist Archive Project (US solidarity with African struggles)
Nordic Documentation on the Liberation Struggle in Southern Africa
Pan-Africanist Congress of Azania (via Bishopsgate Institute)
Toronto Committee for the Liberation of Southern Africa
Anti-colonial/anti-imperial
Bulletin of the 1955 Bandung Conference
Anti-fascist
Campaign Against Racism and Fascism journal
Il Risveglio (Italian language anti-fascist newspaper in post-war Australia)
La Vérité (French anti-fascist journal in New York 1941)
Argentina
El Topo Blindado (The Armoured Mole – documents from Argentinian underground during the dictatorship)
La Vanguardia (newspaper of Argentinian Socialist Party)
Pasado y Presente archive (Argentinian left book series of Marxist texts in Spanish)
Revista Estrella Roja (journal of Ejercito Revolucionario del Pueblo)
Armenia
Early Armenian Printed Documents (from British Library, includes newspapers and journals from Armenian labour groups and from Soviet Armenia)
Australia
Communist Review (Australia)
Communist Party of Australia (via Parlinfo)
Communist Party of Australia pamphlets (from State Library of Victoria)
Democratic Socialist Party/Revolutionary Socialist Party archive
Direct Action (IWW Australia)
Direct Action (newspaper of the Revolutionary Socialist Party)
Green Left Weekly (Australia)
High Times (Australia)
International Socialist (Australian newspaper 1910s)
Marxist Left Review/Socialist Review (Socialist Alternative/ISO theoretical journal)
Noel Butlin Archives Centre (Australian labour history)
Official Strike Bulletin (daily bulletin of trade unions involved in 1912 Tramways Strike in Brisbane)
Radical Times Archive (has Queensland focus)
Red and Black Notes (Anarchism in Australia)
Revolution (Australia)
Socialist Party of Australia (via Parlinfo)
Socialist Workers Party (Australian SWP via Parlinfo)
The Australian Communist (early CPA newspaper)
The Communist (Australia)
The Dawn (19th century feminist journal)
The Digger (Australia)
The Living Daylights (Australia)
The Militant (Australian Trotskyism in 1930s)
The Socialist (Victorian Socialist Party, 1906-1923)
Tribune (Communist Party of Australia newspaper)
Unemployed Workers Online Community Archive (Australia)
Workers’ Star (Communist Party of Australia – Perth newspaper)
Workers’ Weekly (Australia)
Young Socialist League of Australia (via Parlinfo)
Austria
Arbeiter Zeitung (Social Democrat Party in Austria newspaper)
Der Kampf (Austrian socialist journal)
Revolution 1848 (Austrian leaflets and newspapers from the 1848 revolution)
Transcripts of Social Democratic Party in Austria conferences (1888-1919)
Belgium
Belgian clandestine press (World War II)
Belgian labour movement history (Amsab ISH)
Vooruit (newspaper of the Belgian Workers Party)
Black radicalism
African Letters Project (correspondence between American and African activists)
Black Liberation Front (UK black power)
Black Power collection (via Digital Public Library America)
Judy Richardson Papers (SNCC material)
League of Struggle for Negro Rights
The Commentator (newsletter of The Commemoration Committee of the Black Panther Party)
Brazil
Brazilian Digital Newspaper Library (includes a number of communist, socialist and syndicalist newspapers)
Britain
Ahmed Iqbal Ullah Race Relations Resource Centre
Alliance for Workers’ Liberty archive (includes AWL’s predecessor orgs back to Workers’ Fight)
Amiel and Melburn Trust Internet Archive
Archibald Gorrie collection (Leicester centred activism)
Commonweal (Socialist League newspaper)
Community Action archive (via Spaces of Hope website)
Fabian Society and the Young Fabians
Fight Racism! Fight Imperialism!
Forum (journal of the SPGB in 1950s)
General Federation of Trade Unions archive (via Bishopsgate Institute)
George Orwell Archive (UCL)
Hackney Heckler (newspaper of the Hackney Solidarity Gorup)
Institute for Workers Control pamphlets
Leftove.rs (collection of various left/radical collections from across the web, including Race Today, Big Flame and Spare Rib)
Living Marxism (RCP)
May Day Rooms (assorted materials, with libertarian socialist leaning)
Revolutionary Communist Group publications
Socialist Standard Past & Present (SPGB)
Socialist Standard (SPGB – Internet Archive)
Somerset Clarion (journal of The Somerset Community Defence Campaign, 1985-97)
Sparrow’s Nest (UK anarchist and Nottingham centred activism)
Spirit of Revolt (Scottish anarchism)
Splits and Fusions (British Trotskyist history)
Tandana (Asian Youth Movement)
The Red Miner (Workers Power journal during Miners’ Strike)
Trades Union Congress Annual Conference Reports
Trotskyist Bulletin (journal of the League for a Revolutionary Communist International)
Sidney and Beatrice Webb archive (via LSE)
Wirral Socialists (Socialist Party of Great Britain material)
The Worker (first journal of CPGB)
Workers Power/League for the Fifth International archive
Working Class Movement Library photo collection (via University of Salford)
Bulgaria
Kultura (cultural periodical throughout communist and post-communist period)
Cambodia
Drawings of Bun Heang Ung: Life under the Khmer Rouge 1975-1979 (via ANU)
State Gazettes of Cambodia (published by People’s Republic of Kampuchea in 1980s)
Canada
Arm the Spirit (Canadian autonomism)
Documents in Revolutionary Socialism in Canada
Dragonfly Archive (Canadian anarchist movements)
Labor Star (British Columbia)
The Spark (Communist Party of Canada)
Vapuas (Finnish Communist newspaper in Canada)
Chile
Fortín Mapocho archive (Chile)
China
Chinese Digital Archive 1966-1976 (Cultural Revolution documents via ANU)
Chinese Public Health Campaign Slides 1950s-1970s
Hongse Zhonghua (Chinese Communist Party newspaper)
Liberation Daily (Chinese Communist Party newspaper)
People’s Daily (Chinese Communist Party newspaper)
Xin Zhonghua bao (Chinese Communist Party newspaper)
Communist International/Cominform
Comintern publications (in Russian)
For a Lasting Peace, For a People’s Democracy (Cominform journal)
Portail Archives Politiques Recherches Indexation Komintern et Fonds Français (French Comintern documents)
Protocols of the Communist International (in German)
Cuba
Cuban newspapers of the 1960s (via UFDC Cuban Newspapers and Periodicals)
Noticias de Hoy (Cuban Communist Party newspaper)
Cyprus
Czechoslovakia
Nová Mysl (journal of the Czech Communist Party)
Protocols of the Congress of the Czech Communist Party 1949
Rudé Právo (paper of the Czech Communist Party)
Denmark
Snylterstaten (Danish Maoism and radical anti-imperialism)
Egypt
Revolutionary Communist League (Egyptian Trotskyists)
Environmental activism
Magazines from the Laka Archive (international movement against nuclear power)
Ethiopia
Assorted Ethiopian literature (related to Derg and Mengistu government)
Feminism
Broadsheet (NZ feminist magazine)
Féminismes en Revue (French feminist journals)
HERstory publications archive (UK feminist publications from 1970s-80s)
m/f (feminist journal)
Rise Up! (Canadian feminist archive)
Scarlet Women (Women’s liberation journal from northern England)
Women’s Liberation Movement Print Culture
First International
Documents of the First International (in French)
Minute Book of the General Council of the International Workingmen’s Association (via Bishopsgate Institute)
France
Archives.Mai68 (Japanese/French archive of May 1968 material)
Archives Autonomies (French language material)
Bibliothèque Marxiste (French communism and Maoism)
Bibliothèque Numérique du CERMTRI (French communism and Trotskyism)
BnF Gallica (various links to French Communist Party papers)
Brochures of the Marxist Library of Paris
Centre de Recherche pour l’Alternative Sociale (CRAS) (French radical journals)
Congresses of the French Section of the Workers’ International (SFIO) (1899-1920)
Jean Jaurès’ Historie socialiste de la Révolution Française (8 volumes)
L’Humanité archive (PCF)
La Bataille Socialiste (French)
Odysséo (French migrant and anti-racism archive)
Pandor (Politics, Social Criticism and Social Movements collections)
Reassembler, diffuser les archives de révolutionnaries (RADAR – French Trotskyist archive)
Germany
Collection 1848 (German leaflets from 1848 revolution)
Dataspace – Databank für Linke, Alternative, Graue Literatur (archive of German language radical publications)
Der Sozialistische Arzt (German socialist medical journal)
Die Internationale (journal of the KPD from 1919 to 1924)
Die Kommuistin (newspaper of KPD’s women’s section, edited by Clara Zetkin)
Die Kommunistische Fraueninternationale (1921-1925)
Die Rote Fahne (paper of the German Communist Party)
Entdinglichung (German left history)
Exilpresse Digital (Publications of exiles from Nazi Germany)
Friedens Forum (newsletters of the German Peace Network)
Friedrich Ebert Stiftung newspaper archive
German Federal Archives digital collection (includes digitised material from DDR)
German security documents on left in Germany (1912-1945) in Russian archives
Historical Press of German Social Democracy Online
IMSF Jahrbuchen (Institut für Marxistiche Studien und Forschungen yearbooks)
Internationales Ärztliches Bulletin (Exiled German socialist medical journal from 1930s)
Kapitalistate (radical economics journal 1970s-80s)
Kommunistiche Arbeiterzeitung (KAZ – from 1990s)
Kritische Justiz journal archive
Mao Projekt (German far left)
Marxistische Streit und Zeitschrift journal archive
Politische Berichte (West German left from 1980s)
PROKLA journal (formerly Problems of Class Struggle/Probleme des Klassenkampfs journal)
Revolutionzären Zellen/Rote Zora
Social Democratic Party of Germany press archive (via Friedrich Ebert Stiftung)
Socialist Women’s Conferences in Germany and Austria, 1900-1913
Telegraph (East German opposition journal)
Women’s Conference of the SPD (1900-1911)
Ghana
The Spark (weekly Ghanaian journal for international audience – Nkrumahist)
Grenada
Women in the Grenada Revolution
Guatemala
Guatemala News and Information Bureau Archive
Hungary
Párttörténeti Közlemények (journal of the Hungarian Socialist Workers’ Party)
Társadalmi Szemle (1970s magazine of the Hungarian Socialist Workers’ Party)
Zala-Népakarat (newspaper of the Hungarian Soviet Republic, 1919)
Human rights
Iceland
Gegn fasismanum (Icelandic Anti-Fascist Committee in 1930s)
Jólablað verkakvenna (Women’s section of the Communist Party of Iceland)
Neisti (Icelandic Trotskyism)
Rauði fáninn (Icelandic Young Communist League)
Rauðir pennar (Icelandic Marxist literature journal)
Samstaða gegn her í landi (Icelandic anti-militarism paper from 1970s)
Sovétvinurinn (Friends of the Soviet Union in Iceland)
Stéttabaráttan (Icelandic Maoism)
India
Bāg̲h̲ī/Viplav (Marxist Indian independence journal)
Dēśabratī (Communist Party of India (Marxist-Leninist) newspaper)
Frontier (Indian Marxist journal)
Janayuddha (journal of Bengali Committee of the Communist Party of India, 1942-44)
Krānti (Telugu language journal of the Communist Party of India (Marxist))
Mārkcist (Tamil language journal of the Communist Party of India (Marxist))
M.P.T. Archarya archive (Indian anarchist)
New Age (Communist Party of India journal 1958-65)
Revolutionary Democracy (Indian Stalinism)
Viplava (Marxist Indian independence journal)
Viplavī ṭrekṭa (Marxist Indian independence journal)
Iran
Ireland and Irish republicanism
Class Struggle (journal of Irish Workers Group)
Desmond Greaves archive (includes Irish Democrat archive)
Irish Citizen (Irish Women’s Franchise League)
Irish Election Literature (Irish left category)
Irish Labour History Society/Dublin City Library and Archive collection (via Digital Repository of Ireland)
Irish Republican Movement Collection (Indiana University)
Socialist Worker (Ireland) archive
The Struggle Site (Irish anarchism documents)
The Watchword (Irish TUC newspaper 1930-32)
Israel
Italy
Archivo Autonomia (Italian autonomism/operaismo)
Avanti! (newspaper of the Italian Socialist Party)
Biblioteca Gino Bianco (Italian left archive)
Pio La Torre archive (Italian Communist figure)
Jewish radicalism
Fraye Arbayṭer Shṭime (Yiddish anarchist newspaper)
International Workers Order and Jewish People’s Fraternal Order
Jewish resistance, 1933-1945 (via Princeton University)
Jungt Veker (Journal of Tsukunft (Future) Youth movement of the Bund in Poland)
Kurdistan
Serxwebun (paper of the Kurdistan Workers Party)
Labour and Socialist International
Labour and Socialist International Archives (via IISH)
Latin America
Anarchist and Syndicalist Periodicals from Latin America
Centro de Documentación e Investigación de la Cultura de Izquierdas (includes number of Latin American left-wing journals)
Latin American Digital Initiatives (includes material from Brazil, El Salvador and Colombia)
Latin America Ephemera (from Princeton University microfilm collections
Lebanon
Lebanese new left in the 1960s-70s (via the IISH)
LGBT
Body Politic (Canadian gay liberation journal)
Camp Ink (Australian gay rights journal)
Cork LGBT Archive (via Digital Repository of Ireland)
Gay Liberation Front (via Bishopsgate Institute)
Lesbians Talk Issues (UK lesbian pamphlets via Bishopsgate Institute)
LGBTQIA+ Periodical and Ephemera Collection (via Princeton University)
One: The Homosexual Viewpoint (early gay rights journal in US, 1950s-70s)
Maoism
Banned Thought (collection of global Maoist literature)
Massline.org (features Peking Review and People’s China collections)
Marx & Engels
Marx & Engels Collected Works (via Lawrence & Wishart)
Mexico
Miscellaneous
Archivo Rebelde/Rebel Archive (leftist newspapers, primarily Spanish language)
Assorted communist stuff (via Socialist Truth – Cyprus)
Centre of Marxist Studies digital archive
Emerging Nationalism in Portuguese Africa (anti-colonial and nationalist movements)
International Labour and Radical History Pamphlet Collection (Canada focused)
Industrial Workers of the World documents
Left Side of the Road (Albania, China, Palestine docs)
Modern Records Centre at University of Warwick (featuring collections on Chilean Solidarity campaign, journal of the Fire Brigades’ Union, the 1926 General Strike, the Russian Revolution in Britain, British involvement in Spanish Civil War)
Monoskop (Avant-garde and modernist magazines)
Next Year Country (assorted US and Canadian material)
Political and Rights Issues and Social Movements collection
Rebel Archive (leftist newspapers, primarily Spanish language)
Reds/Die Roten (English/German left texts)
Robarts Library (University of Toronto collection – assorted communist publications)
University of Alberta World Communism in the 20th Century Collection
Mozambique
Mozambique History Net (material from national liberation struggle)
Netherlands
Antonie Pannekoek Archives (Dutch/German Left Communism)
De Nieuwe Tijd (Dutch social democratic journal 1890s-1910s)
De Tribune (Dutch Communist Party newspaper)
De Waarheid (paper of the Dutch Communist Party)
Henk Sneevliet documents (via IISH)
Het Volk (newspaper of Social Democratic Workers Party in Netherlands)
Marxist Perspectives (Dutch journal from late 1970s)
New left/1960s
Freedom archive (US and international material from 1960s-80s)
Oz (Sydney)
Oz (London)
New Zealand
Communist Party of New Zealand
Industrial Unionist (New Zealand IWW)
International Socialist Organisation
Maoriland Worker (New Zealand)
RADAR Project (New Zealand left history)
North Korea
DPRK’s Ministry of Foreign Affairs publications
Korean Central News Agency Yearbooks (assorted years from 1950s to 1980s)
Kulloja (journal of the Workers Party of Korea – 1940s available)
Norway
AKP M-L Historie (Norwegian Maoism)
Alarm (Norwegian anarchist newspaper)
Norges Kommunistblad (Communist Party of Norway newspaper)
Pakistan
Awami Workers Party (publications from the 2000s)
Urdu Leninist texts (via Ibteda Digital Library)
Palestine
Ittihad Al-‘Ummal (Palestinian workers journal from 1920s)
Nidal al-Sha’b (newspaper of Palestinian Communist Party)
Popular Front for the Liberation of Palestine historical documents
Parapolitics
Covert Action Information Bulletin
Philippines
Gunita: Mga Pahina Mula sa Panahon ng Diktadura (Filipino archive of movement against Marcos dictatorship)
Poland
Dziennik Polski (regional Polish paper from communist era)
Europejskie Centrum Solidarność (archive of Polish Solidarity movement)
Nowe drogi (1980s magazine of the Polish United Workers’ Party)
Życie partii (journal of the Polish United Workers’ Party)
Posadism
Long Live Posadas! (collection of writings by J. Posadas)
Portugal
Movimento Reorganizativo do Partido do Proletariado (Portguese Maoism)
Romania
Anarhiva (Romanian anarchism)
Camera Arhiva (Romanian publications from Cold War era)
National Archives of Romania online photo collection (photographs from Communist era Romania)
Second International
Proceedings of the Congresses of the Second International, 1889-1912
Second International archive (at IISH)
Second International newspapers online (via IISH)
Somalia
Halgan (English language journal of Somalian Revolutionary Socialist Party)
Somali Democratic Republic sources (via Archivio Apart di Ateneo)
South Africa
Azania Combat (journal of the Azanian People’s Liberation Army)
Congress Militant (journal of the Marxist Workers’ Tendency of the ANC, 1990-1994)
Digital Innovation South Africa (including Communist Party and ANC material, as well as Searchlight South Africa)
Hashim Mbita Southern African Liberation Struggles
Inqaba Ya Basebenzi (journal of the Marxist Workers’ Tendency of the ANC, 1981-1990)
South Africa History Online (with lots of material on anti-apartheid, South African communism, and trade unions)
The International (newspaper of International League of the South African Labour Party/Communist Party of South Africa)
Wits Historical Papers (includes material on Communist Party of South Africa and ANC)
Workers’ Unity (journal of the South African Congress of Trade Unions, 1977-1980)
Soviet Union/Russia
British Ally (Soviet newspaper from WWII)
Congresses of the Russian Social Democratic Labour Party (1899-1924)
Geroicheskii Pokhod (Red Army newspaper in WWII)
GPIB Electronic Library (includes number of radical Russian periodicals from Tsarist period, Russian radical diaspora periodicals and periodicals from Soviet era)
Iskra (in Russian)
Iskra Research (pre-October 1917 Russian Marxist journals)
Ismail (links to indexes of scans of Soviet literature on archive.org)
Kommari Library, (collection of Russian-language communist books and books on communism)
Kommunar (Russian journal from early 1920s)
Krasnyy Arhiv (Soviet historical journal) (alternative site)
Krokodil (Soviet satirical journal)
Moskovskii Bolshevik (1941-42)
Moskovskii Bolshevik (1944-1947)
NEP era publications from Soviet Union
New Life (Bolshevik newspaper from 1905)
New Life (Menshevik newspaper from 1917-18)
Newspapers of the Soviet Period
Oparinskaya Iskra (Soviet journal from Kirov region)
Pioneer (Soviet journal for children)
Pravda issues from 1917 (in Russian)
Princeton University Soviet journals collection
Rabochaya Gazeta (RSDLP exile paper in Paris)
Rabotnik (Russian Marxist journal from late 1890s)
Rabotnitsa (Russian socialist women’s journal from 1914)
Revolution and Highlander (Soviet Adygean journal)
RSDLP/RCP(b) Congresses 1898-1927
Russian exile publications (from UB Bern – Swiss Library of Eastern Europe)
Russian satirical journal archive (via University of Chicago)
Sovetskoe Zdravookhranenie (Soviet Healthcare journal)
Soviet Belorussian publications (1919-1939)
Soviet Bloc security documents (conferences between Soviet aligned nations)
Soviet Culture Review (English language journal of VOKS)
Soviet Khakassia (Russian)
Soviet Kuldiga (Latvia)
Stalinka (Pittsburgh University archive of Stalinist ephemera)
Transcripts of Bolshevik/CPSU Congresses
Tribuna (journal of the Society for the Land Arrangement of Jewish Workers in the USSR)
Truth of the East (Soviet Uzbek paper)
Ukrainian Soviet newspapers in 1920s
Under the Banner of Marxism (Soviet journal in Russian)
Voice of Uzbekistan (Soviet Uzbek paper)
Yoshkar Keche (CPSU paper in Mari Republic)
Spain
Alexandria Proletaria (Spanish language Marxist texts from Germinal group)
Archivo Fundación Pablo Iglesias (Spanish socialist historical documents)
Archivo Obrero Newspaper Library (Spanish language publications)
Centre de Documentació Antiautoritari i llibertari (Spanish anarchism)
Centro de Estudios Históricos de los Trabajadores y las Izquierdas (CEHTI) (collection of Spanish trade union journals)
Colección Indignados/Movimiento 15M
Communist Party of Spain (Marxist-Leninist) archive
Germinal – In Defence of Marxism archive (Spanish Trotskyism)
La Verdad Obrera (PTS journal)
Partit Socialista Unificat de Catalunya
Spanish Civil War
Abraham Lincoln Brigade Digital Library
Canada and the Spanish Civil War Digital Repository
Faschismus (German language journal of the International Transport Workers Federation, published during Spanish Civil War)
Papers of Nancy Cunard from Spanish Civil War (Manchester Guardian Archive)
Sri Lanka
Dissidents and Activists in Sri Lanka, 1960s to 1990s
Sweden
Zimmerwald (Swedish socialist journal from 1918-21)
Switzerland
Swiss historical periodical archive (includes Neue Wege, Rote Revue, Die Vorkämpferin and Gewerkschaftliche Rundschau)
Swiss newspaper archive (includes several socialist, anarchist and trade union newspapers, such as La Sentinelle, Le Réveil Anarchiste and Il Risveglio Anarchico)
Timor Leste/East Timor
East Timor Newsletters 1974-1999
Trade unions
The Organizer (Newspaper of the Minneapolis Teamsters’ strike in 1934)
World Trade Union Movement (journal of the WFTU)
Trotskyism
Bulletin of the Marxist Policy Committee (proto-Oehlerite group)
CEIP Leon Trotsky (archive of Spanish language Trotskyism)
Group of Revolutionary Marxists (US Oehlerites from 1940s)
Leon Trotsky Soviet Papers (via Harvard University)
Turkey
Devrimci Sol (Turkish Marxist-Leninist insurrectionism)
Turkey Social History Research Foundation (Turkish left documents)
Turkey Social History Research Foundation (Turkish left periodicals)
Ukraine
Chervone Zaporoizhzhya (Ukrainian)
Revolution Era Ukrainian Press
United States
Activist collections at the University of Texas
American Left Ephemera Collection (University of Pittsburgh)
Brooklyn College, Student Handbills
Campus and Queens Activism of the 1960s
Chinese Overseas Student Newsletters (University of Pittsburgh)
Chronicling America (newspaper database including many regional labour/workers’ newspapers and left-leaning newspapers of European diaspora communities in the US)
Columbia in Crisis (1968 at Columbia University exhibition documents)
Committee Opposed to Militarism and the Draft records
Communist Collection of A.E. Forbes
Communist Party in Massachusetts collection
Communist Workers Group (including Workers’ Banner journal)
Conventions (Congresses) of the Socialist Party of America (1901-1919)
Daily Worker (CPUSA newspapers, scans available from 1924-1935)
Daily Worker (CPUSA newspapers, scans available from 1924-1935 – searchable version via University of Illinois)
Daily Worker (CPUSA newspaper, 1954-1957)
Democratic Left/New American Movement
Detroit Revolutionary Movement Records
Earl Browder Collection (via Syracuse University)
Early 20th Century Socialist Newspapers (University of Buffalo)
Fifth Estate archive (US left journal)
Fourth International/International Socialist Review
GI Press Collection, 1964-1977 (anti-war veterans’ movement in US)
Harvard College Library of socialist, communist and anarchist pamphlets
Howard Zinn digital collection
Independent Voices (US Alternative Press archive)
Industrial Worker (US IWW newspaper)
International News (International Contact Commission/Fourth International journal)
James B. and John J. McNamara Papers (University of Cincinnati)
Joseph A. Labadie Collection (radical documents with US focus)
Labor in America collection (University of Maryland)
Monthly Review (via UNZ)
Perspectiva Mundial (Spanish language journal of US SWP)
Prairie Fire Organising Committee archive
Progressive Librarian journal archive
Radical Newspapers Collection (WSU – holds anarchist papers, The Discontent and The Agitator)
Radical Society (Socialist Revolution/Socialist Review journals)
Science for the People (US Marxist science journal)
Social Change collection (Mass Amherst)
Socialist Party of America (including The Worker newspaper)
Socialist Party of America (assorted material)
Socialist Workers Party Political Committee documents (US SWP)
Socialist Youth Review (Schachtmanite group)
Sojourner Truth Organisation archive
Solidarity! Revolutionary Center and Radical Library (US)
South Asian American Digital Archive (Activism folder)
Soviet Russia Today/New World Review (US pro-Soviet journal)
Students for a Democratic Society documents
Swedish American newspapers in Minnesota (includes a number of socialist and labor newspapers)
The Alarm (Chicago 1880s)
The Communist (USA)
The Militant Archive (SWP newspaper)
The Party Builder (Chicago based newspaper of the Socialist Party of America, 1912-14)
The Voice of Industry (1840s US labour movement newspaper)
Truth (English language newspaper of Scandinavian socialists in Minnesota)
Waterfront Workers History Project
Workers Power (US)
Workers Truth (journal of Revolutionary Workers Group)
Vietnam
Vietnamese Communist Party documents
Vietnamese newspapers (via National Library of Vietnam)
Yugoslavia
Archive of the Antifascist Women’s Front of Yugoslavia
Archive of Yugoslav Humanities
Digital National Library of Serbia (contains a sizeable collection of interwar-era communist newspapers)
Dolenjski List archive (Slovenian language newspaper from 1950 onwards)
Varaždinske Vijesti (Yugoslav paper in Croatian)
Znaci.org (repository of books and documents on the Second World War in Yugoslavia in Serbo-Croatian, German, and English)
Zimbabwe
Zimbabwe Review (Zimbabwe African People’s Union)
Zines
Zines archive (includes a number of anarchist and left communist publications from around the world)
New Historical Express 