• Anarchist Groups
  
  National:
  
  
  Anarchist Federation
  Anarchist Communist Federation of England & Wales. The British section of the International of Anarchist Federations
  
  Solidarity Federation
  Anarchist Syndicalist organisation and the British section of the International Workers Association
  
  Wombles
  Radical anti-authoritarian organisation with emphasis on self-organisation, autonomy and solidarity.
  
  Class War Federation
  Working class libertarian organisation that was created out of a paper called 'Class War' in the 1980's. It promotes the use of direct action and non-pacifism as a means for social change.
  
  Brighton Anarchist Black Cross Network
  Class struggle anarchist group building prisoner support networks as a means to struggle against capitalist and state oppression.
  
  AntiFa
  International militant Anti-fascist [no-platform] and anti-capitalist organisation who advocate violent and direct action methods to fight the spread of Nazism and Fascism, and to challenge capitalism.
  
  Industrial Workers of the World
  International union run directly by its members, promoting global solidarity and direct action for the abolition of capitalist wage slavery. Any member of a trade union can join. Non-union members can also join.
  
  Liberty and Solidarity
  Platformist organisation
  
  Local:
  
  Aberdeen Anarchist Resistance
  A local anarchist affinity group, set up so as to spread libertarian, social, and anti-authoritarian ideas.
  
  Anarchist Federation, North
  Anarchist communist grouping og the Anarchist Federation, which covers Leicster, Nottingham, Sheffield, Bradford/Leeds, Liverpool, Mersyside, Manchester, Preston and Newcastle.
  
  Marxist-Leninist (Trotskyist):
  
  Socialist Workers Party
  Trotskyist party affiliated to the International Socialists. Leading members of the RESPECT coalition.
  
  Socialist Party England & Wales
  Trotskyist party affiliated to the Committee For A Workers' International. Advocates of Transitional Programme.
  
  Workers Power
  Trotskyist organisation affiliated with the League for the Fifth International
  
  Workers Liberty
  Trotskyist organisation.
  
  Spartacist League
  Vanguardist, Orthodox Trotskyist members of the International Communist League - Fourth Internationalist.
  
  Marxist-Leninist (Non-Trotskyist):
  
  Communist Party of Britain
  Marxist Leninist organsiation split from the old Communist Party of Great Britain
  
  New Communist Party
  Marxist-Leninist organisation split from the old Communist Party of Great Britain and unaffiliated with the CPB.
  
  Revolutionary Communist Party (Marxist-Leninist)
  Marxist-Leninist with Maoist tendencies party.
  
  Revolutionary Communist Group
  Marxist-Leninist organisation based in London
  
  Communist Party of Great Britain (Provisional Central Committee)
  A multi-tendency organization of 'Marxist-Leninists' in the UK pushing for a Communist Party of the European Union.
  
  Marxist (Non-alligned):
  
  Socialist Party of Great Britain
  Marxist organisation and member of World Socialist Movement
  
  Scottish Socialist Party
  Reformist, pro-independence, anti-capitalist party
  
  London Coalition Against Poverty
  
  Left Alternative
  Recent group that split from RESPECT

• PVDA (Partij Van De Arbeid)
  Marxist Leninist party
  
  COMAC
  Communist Youth Organization of the Partij Van De Arbeid
  
  Linkse Socialistische Partij / Parti Socialiste de Lutte
  Belgian section of the Committee for a Workers International
  
  Socialistische Arbeiderspartij
  Socialist Workers Party member of the 4th International. This also manifests in the Ligue Communiste Révolutionnaire
  
  GAL
  Student libertarian/anarchist group based in Leuven
  
  AK (Anarchistisch Kollektief)
  Anarchist collective based in Gent.
  
  

• Internationale Socialister
  Trotskyist party with links to the International Socialists.

• 
  Estonian Anarchist collective

• Socialiste Libertaire
  
  Libertarian Socialist organisation based in parts of Switzerland.

• Socialisme Par En Ba
  Trotskyist organisation, affiliated to the International Socialists.
  
  Fédération Anarchiste
  Anarchist Communist Federatiuon of France, Belgium and Luxembourg. Member of the International of Anarchist Federations
  
  Confédération Nationale du Travail
  Anarchist Syndicalist organisation and French section of the International Workers Association
  
  Parti Communiste Français
  An amalgomation of Marxist-Leninist traditions and reformism.
  
  Organisation Communiste Libertaire
  French Libertarian Communist organisation drawing its politics from the 1926 Platform of organisation.
  
  Ligue Communiste Révolutionnaire
  Trotskyist organization and French members of the Fourth International.
  
  Alternative libertaire
  Working class libertarian organisation and French member of International Libertarian Solidarity
  
  No Pasaran
  Libertarian Anti-Fascist organisation.
  
  Parti des Travailleurs
  Trotskyist organization linked to International Liaison Committee for a Workers' International
  
  Coordination des Groupes Anarchistes
  An Anarchist communist group, split from the Fédération Anarchiste.
  
  Lutte Ouvrière
  Trotskist organization which has created its own international the Union Communiste Internationaliste
  
  Parti Socialiste
  Reformist Social Democrat Party
  
  Pouvoir Ouvrier
  Trotskyist organisation affiliated with the League for the Fifth International
  
  Gauche Révolutionnaire
  French Socialist party and member of the Committee for a Workers International.

• Linksruck
  Trotskyist party with affiliation to the International Socialists.
  
  Sozialistische Alternative Voran
  Trotskyist organisation, and member of the Committee for a Workers International
  
  Initiative fur eine Anarchistische Foderation (i-afd@anarch.free.de)
  Anarchist Communist Federation and German section of the International of Anarchist Federations
  
  Freie ArbeiterInnen Union
  Anarchist Syndicalist organisation and German section of the International Workers Association
  
  Deutsche Kommunistische Partei
  Traditional Marxist party with former Stalinist ties.
  
  AntiFa
  International militant Anti-fascist [no-platform] and anti-capitalist organisation who advocate violent and direct action methods to fight the spread of Nazism and Fascism, and to challange capitalism.
  
  Arbeiter Macht
  Trotskyist organisation affiliated with the League for the Fifth International
  
  Sozialistische Deutsche Arbeiterjugend (SDAJ)
  Marxist-Leninist youth organisation
  
  Interventionistische Linke
  Network of anti-capitalist groups
  
  Die Linke
  Reformist party
  
  Linksjugend ['Solid]
  Youth section of Die Linke
  
  Rote Hilfe E.V
  Solidarity organisation
  
  DIDF (Föderation demokratischer Arbeitervereine)
  Socialist organisation

• Anarchist Federation Anarchist Communist Federation, affiliated with the English and Welsh Anarchist Federation and Irish section of the International of Anarchist Federations
  
  Communist Party of Ireland
  Marxist-Leninist party.
  
  éirígí
  Socialist republican campaigns group.
  
  Irish Republican Socialist Movement
  Republican organisation advocating the removal of British rule from all Ireland with the creation of a workers republic.
  
  Organise!
  Irish Anarchist syndicalist organisation.
  
  Socialist Party
  Trotskyist party which is the Irish section of the Committee For A Workers' International. Northern Ireland section.
  
  Socialist Workers Party
  Trotskyist party affiliated to the International Socialists.
  
  Workers Solidarity Movement
  Platformist organisation

• Communismo dal Basso
  Italian affiliate of the Trotskyist International Socialists.
  
  Federazione Anarchisti Italiano
  Anarchist Communist Federation and Italian member of the International of Anarchist Federations
  
  Federazione dei Comunisti Anarchici
  Anarchist Communist Federation and member of International Libertarian Solidarity and the Anarchist Platform
  
  Unione Sindacale Italiana
  Anarchist Syndicalist organisation and Italian member of the International of Worker Associations.
  
  Lotta
  Italian Socialist party and member of the Committee for a Workers International

• ADA (Anti-Authoritarian Autonomous Action)
  Local Libertarian-Left group
  
  CWI Cyprus
  Cyprus section of the Committee for a Workers International

• Internationale Socialisten
  Dutch Trotskyists, affiliated to the International Socialists
  
  Anarchistische Groep Amsterdam
  Anarchist Syndicalist group in Amsterdam
  
  Buiten de Orde
  Dutch libertarian-syndicalist group with union ties.
  
  Ithaka
  Anarchist group in the Dutch city of Utrecht.
  
  New Communist Party Netherlands
  Marxist-Leninist Party.
  
  Communistische Jongeren Beweging
  Youth wing of the New Communist Party Netherlands. Online magazine - Voorwaarts!
  
  GWL/De Rode Morgen
  Maoist Party which is active in Rotterdam
  
  Offensief
  Dutch section of the Committee for a Workers International
  
  Anarchist Black Cross
  Prisoner support group
  
  Anti-Fascist Action
  National Anti-Fascist group with local subgroups
  
  DIDF
  Socialist organisation of Turkish Immigrant Workers
  
  Antifa! Amsterdam
  Antifascist group in Amsterdam
  
  Groenfront
  Autonomous-Environmentalist group, similar to that of Earth First!
  
  Kraak Spreek Uren (KSU)/ Kraak Beweging
  Squatter assistance housing and the Squatters movement, connected with the autonomist movement
  Websites: Squat.net Netherlands and Kraak Forums

• Internasjonale Sosialister
  The Norwegian Trotskyist party affiliated to the International Socialists
  
  Rød Valgallianse
  Popular Socialist party with Marxist leanings.
  
  Norway Anarchist Sydnicalists
  Contact information for the Norway section of the International Workers Association.

• Communist Party of Portugal
  
  Marxist-Leninist Party, one of the most powerfull in western Europe
  
  Juventude Comunista Portuguesa
  
  Youth of the Communist Party of Portugal
  
  Partido Ecologista/Os Verdes (The Greens)
  
  Ecologist Party in coalition with the Communist Party of Portugal, leaves there socio-economic program in the hands of the PCP. Satirically called the "Watermelons"(Green from the outside, red inside) by critics
  
  Communist Party of the Portuguese Workers / Reorganizative Movement of the Party of the Proletariat
  
  Maoist Party
  
  Bloco Esquerda (Left Bloc)
  
  Left social-democratic party ("Democratic Socialist" on the model of the German "Die Linke"). Was formed by numerous small revolutionary and reformist parties to form an "alternative" to the PCP. Has most of Portugal's Trotskyist Parties entrying it (incl. the biggest, Revolutionairy Socialist Party), and some former Maoists/Hoxaists (like the Peoples Democratic Union)
  
  Revolutionairy Socialist Party
  
  Trotskyist, linked to the 4th International (reunified)

• En Lucha
  Spanish organisaton linked to the Trotskyist International Socialsts
  
  CGT
  Now the third largest Union in spain, with over 70,000 members.
  
  Federacion Anarquista Iberica
  Anarchist Federation and Spanish member of the International of Anarchist Federations
  
  
  Confederación Nacional del Trabajo
  Anarchist Syndicalist organisation and Spanish member of the International Workers Association.
  
  Manifiesto
  Spanish section of the Committee for a Workers International

• Anarchist Groups
  
  National:
  
  Red & Anarchist Action Network
  Network of individuals or collectives of libertarian communists and social anarchists. (Note: The Network still exists, but the site is at the moment down)
  
  Anarchist Black Cross Network
  Class struggle anarchist group building prisoner support networks as a means to struggle against capitalist and state oppression.
  
  Anarchist Resistance
  Cluster of affinity groups and individuals dedicated to anarchist action against capitalism and the war.
  
  Workers Solidarity Alliance
  Anarchist Syndicalist organisation.
  
  Regional:
  
  Northwestern Anarchist Federation
  Anarchist communist organization from the northwestern region of North America. Includes the the Anarchist Communist Union of Portland (ACUP@NAFederation.org), the Anarchist Communist Union of Seattle (ACUS@NAFederation.org), the Victoria Anarchists Collective (Victoria@NAFederation.org), and several other local groups.
  
  North Eastern Federation of Anarchist Communists
  Bi-lingual (French and English) organization of revolutionary anarchists from the northeastern region of North America.
  
  Heatwave Communist Anarchist Federation
  Anarchist Communist/Libertarian Marxist Federation based in Texas
  
  Southern Californian Anarchist Federation
  A decentralized, regional network of anarchist collectives in Southern California
  
  New York Metro Assoc. of Anarchists
  Group of anarchist based in the New York metropolitan area.
  
  IWW - New York
  New York branch of the Industrial Workers of the World
  
  Alliance for Freedom and Direct Democracy
  An anti-authotarian organisation based in Albuquerque, Seattle and New York City.
  
  Action for Community in Raleigh (ACRe)
  Anarchist group in North Carolina
  
  Raleigh Anarchist Solidarity Collective
  Class-struggle Anarchist collective. They can be contacted via email: raleighanarchism@gmail.com.
  
  Marxist-Leninist (Trotskyist):
  
  Socialist Alternative
  Trotskyist organisation and American section of the Committee for a Workers International
  
  International Socialist Organisation
  Trotskyist organisation.
  
  Socialist Workers Party
  Trotskyist party.
  
  Freedom Socialist Party
  Feminist Trotskyist Party.
  
  Marxist-Leninist:
  
  Communist Party, USA
  Marxist-Leninist organisation.
  
  Party for Socialism and Liberation
  Marxist-Leninist organization.
  
  Revolutionary Communist Party
  Marxist-Leninist-Maoist organisation. American section of the Revolutionary Internationalist Movement.
• World Workers Party
• Marxist Organisation the World Workers Party -> see www.workers.org
  
  Marxist (Non-alligned)
  
  Students for a Democratic Society
  Broad based socialist student direct action group based across the whole of the US.
  
  Communist League
  Classical Marxist organisation.
  
  Socialist Party USA
  A multi-tendency democratic-socialist party with currently a revolutionary majority in leadership, most notably the Debs Tendency

Workers Party in America
Multi-tendency communist party. Also used as a public organization for the Communist League.

Other

Workers Alliance
An organization in which the working class unites and brings about real and lasting change through the force of its collective power.

Industrial Workers of the World
International union run directly by its members, promoting global solidarity and direct action for the abolition of capitalist wage slavery. Any member of a trade union can join.

• Socalist Alternative
  Trotskyist party and Canadian member of the Committee for a Workers International
  
  Parti Communiste Révolutionnaire - Revolutionary Communist Party
  Marxist-Leninist-Maoist organisation
  
  Communist Party of Canada
  Marxist-Leninist organisation
  Youth wing:Young Communist League
  
  Parti Communiste du Québec
  Marxist-Leninist organisation based in Quebec
  
  Groupe Anarchiste Émile-Henry
  Anarchist Communist federation and member of the North Eastern Federations of Anarcho-Communists
  
  Socialist Party of Canada
  Marxist organisation and member of World Socialist Movement
  
  International Workers of the World
  International union run directly by its members, promoting global solidarity and direct action for the abolition of capitalist wage slavery. Any member of a trade union can join.
  
  Marxist Leninist Party
  Suprisingly a Marxist-Leninist organisation, split from the Communist Party of Canada.
  
  FightBack
  Trotskyist organization, member of the International Marxist Tendency
  
  Common Front
  Montreal organization, friendly ties with the International Marxist Tendency

• VOCAL (Oaxan Voices Constructing Autonomy and Freedom)
  Libertarian organisation in Oaxaca, Mexico.
  
  Grupo Socialista Libertario
  Platformist group
  Contact via email: enlace.gsl@gmail.com

• Socialist Party of Australia
  Trotskyist party and Australian member of the Committee for a Workers International
  
  Ozanarchy
  Online guide to Australian Anarchism.
  
  International Socialist Organisation
  Trotskyist organisation and member of the Socialist Alliance and affiliated with the International Socialists.
  
  A Political Information
  Australian anarchist resource and news service, also a good first point of contact to Anarchist groups around the country.
  
  Communist Party of Australia
  Marxist-Leninist organisation.
  
  Democratic Socialist Perspective
  A revolutionary marxist party and member of the Socialist Alliance
  
  Anarcho-Syndicalist Network
  Anarcho-syndicalist organization
  
  Anarcho-syndicalist Federation
  Anarcho-syndicalist union, and friend of the International Workingmans Association
  
  Mutiny Collective
  Anarchist collective based in New South Wales
  
  Sydney Anarchist Communist Trajectory
  Sydney based anarchist communist group
  
  Jura Books
  30 year old anarchist run bookstore based in Sydney
  
  Black Rose Anarchist Library and Bookshop
  
  Direct Action
  Socialist group which split/was expelled from the Socialist Alliance
  
  Socialist Alternative
  Socialist Party

• The Workers Party
  NZs largest left wing party. Historically, the Workers Party followed the Maoist tradition, however, it is now a multi-tendency party.
  
  International Socialist Organisation
  Trotskyist organisation.
  
  Socialist Aotearoa
  Socialist group affilated with the International Socialist Tendency (See Internationals at the end of this list)
  
  Aotearoa Workers Solidarity Movement
  Anarchist Communist Group
  
  Auckland Anarchist Network
• Network of anarchist groups in Auckland, puts on regular discussions and public talks.
  
  Rebel Press
  Anarchist publishing collective operating in Wellington
  
  Katipo Books
  Radical book publishing collective, also online bookstore

• Nigeria
  
  Democratic Socialist Movement
  Socialist party, member of the Committee for a Workers International
• South Africa
  
  Democratic Socialist Movement
  South African section of the Committee for a Workers International
  
  Zabalaza
  anarchist communist federation from South Africa.
  
  Anarchist Black Cross
  Part of the ZACF (Zabalaza Anarchist communist Front)

• International Marxist Tendency
  Trotskyist organization with mass sections in Pakistan, Spain, Italy, Venezuela and elsewhere.
  
  International Communist Current
  Left Communist International
  
  Committee for a Workers International
  Website, news service and other information about and concerning the Marxist international
  
  International Bolshevik Tendency
  A small organisation that split from the Sparts.
  
  International of Anarchist Federations / l'Internationale des Federations Anarchistes
  Anarchist Communist International.
  
  International Bolshevik Tendancy
  Vanguardist, Trotskyist organisation that split from the International Communist League-Fourth Internationalist (Spartacist League).
  
  International Communist League - Fourth International
  Trotskyist Vangaurdist International
  
  International Communist Movement
  International Cooperation organisation most large and small anti-revisionist communist parties and movements from al kinds of marxist-leninist backgrounds (even semi-trotskists like the World Workers Party)
  
  International Workers Association
  Anarcho-syndicalist International
  
  Party of World Revolution
  Revolutionary communist party with sections and members all over the world.
  
  World Socialist Movement
  Marxist international organisation.
  
  League for the Fifth International
  Orthodox Trotskyist International.
  
  Revolutionary Internationalist Movement
  Maoist International.
  
  World Federation of Democratic Youth
  International youth federation of anti-imperialist and anti-fascist youth movements, Founded in 1945. Closely tied to former 3rd international parties youth movements, but also includes other leftist and non-communist youth movements. It also organizes the World Youth Festivals
  
  International Socialist Tendency
  A group of Trotskyist parties around the world following the ideas of Tony Cliff, including the Socialist Workers Party in the UK.
  
  Hoxhaist Union
  Anti-Revisionist Marxist-Leninist organisation, upholding Socialist Albania and the ideas of Enver Hoxha