Partiti Trotskisti
	Leftist Parties of the World

• The Militant (El Militante), Argentina
• The Spark (Der Funke), Austria
• Spark (Vonk), Belgium
• FightBack, Canada
• Socialist Standpoint (Socialistisk Standpunkt), Denmark
• Counter-attack (La Riposte), France
• The Spark (Der Funke), Germany
• Socialist Appeal periodical, In Defense of Marxism periodical, Great Britain, active inside Labour Party
• Marxist Voice (Marxistiki Foni), Greece
• Shining Light (Cahaya), Indonesia
• Iranian Revolutionary Socialists' League (Ettehadi-ye Sosiyalistha-ye Enqelabi-ye Iran, IRSL)
• In Defence of Marxism, Israel
• Spark (Iskra), Israel
• Sickle Hammer (Falce Martello), Italy, active inside PRC
• Militant (Militante), Mexico, active inside PRD
• Struggle (Jeddo Judh) trade union wing, Pakistan
• Socialist Left Force (Fuerza de Izquierda Socialista, FIS), Peru
• Socialism (Socjalizm), Poland
• Workers Democracy (Rabochaya Demokratiya), Russia
• Insurgent Reason (Pobunjeni Um), mirror page, Serbia and Montenegro (close to CMI)
• Forward! - Slovenian Marxist Circle (Naprej! - Stran Slovenskih Marksistov)
• The Militant (El Militante), Spain
  • Militancy (Militancia), Spain/Andalusia
  • Marxist Left (Esker Marxista), Spain
  • Yesterday and Today (Onte e Hoxe), Spain
• The Socialist (Socialisten), Sweden
• Marxist Attitude (Marksist Tutum), Turkey
• Workers International League (WIL), youth organization, USA
• Revolutionary Marxist Current (Corriente Marxista Revolucionaria), Venezuela

Committee for a Workers International (CWI)

• Socialist Party, Australia
• Socialist Left Party (Sozialistische LinksPartei, SLP), Austria
• Leftist Socialist Party / Movement for a Socialist Alternative (Linkse Socialistische Partij / Mouvement pour une Alternative Socialiste, LSP/MAS), Belgium
• Revolutionary Socialism (Socialismo Revolucionário, SR), Brazil
• Socialist Alternative / Alternative Socialiste, Canada
• Socialist Alternative Future (Socialistická alternativa Budoucnost), Czech Republic
• Socialist Alternative (Sosialistinen Vaihtoehto), Finland
• Revolutionary Left (Gauche Révolutionnaire, GR), France
• Socialist Alternative (Sozialistische Alternative, SAV), Germany
• International Socialists, Great Britain/Scotland
• Socialist Party (SP), Great Britain
• Socialist International Organisation "Start" (Sosialistiki Diethnistiki Organosi "Xekinima"), Greece
• Socialist Party, Ireland, Northern Ireland
• Socialist Struggle (Ma'avak Sotsyalisti), Israel
• Struggle for Socialism (Lotta per il Socialismo), Italy
• Offensive (Offensief), Netherlands
• Democratic Socialist Movement (DSM), Nigeria
• Group for a Workers Party (Grupa na rzecz Partii Robotniczej, GPR), Poland
• Socialist Resistance (Sotsialisticheskoye Soprotivlemiye), Russia
• Justice Party Socialists (Rättvisepartiet Socialisterna), Sweden
• Socialist Alternative, USA

Committee of International Rapprochement

• Socialist Convergence (Convergencia Socialista), Argentina
• Left Party, USA

Communist Organization for the Fourth International  (COFI)

• Communist Organization for the Fourth International - FRG (Kommunistische Organisation für die Vierte Internationale-BRD, KOVI-BRD), Germany
• League for the Revolutionary Party (LRP), USA

Coordinating Committee for the Refoundation of the Fourth International (CRFI)
Tendency aound the Argentinian Workers Party (Partido Oberero, PO)

• Workers' Party (Partido Obrero, PO), Argentina
• Workers' Cause Party (Partido da Causa Operária, PCO), Brazil
• The Proletarian Society of China periodical The Trotskyist, China/Hongkong, close to CRFI
• Workers Revolutionnary Party (Ergatiko Epanastatiko Komma, EEK), Greece
• Socialist Workers League, Israel/Palestine
• Revolutionary Marxist Association "Communist Project" (Associazione Marxista Rivoluzionaria "Progetto Comunista"), Italy, active inside PRC
• Workers' Party (Partido de los Trabajadores, PT)
• Workers Action, USA

International Bolshevik Tendency (IBT)

• International Bolshevik Tendency (Spartacus Group) (Internationale Bolschewistische Tendenz (Gruppe Spartakus)), Germany
• Marxist Bulletin, Great Britain

International Center of Orthodox Trotskyism (Centro Internacional del Trotskismo Ortodoxo - IV Internacional, CITO)

• Guernica Socialist Group (Grupo Socialista Guernica), Argentina
• Socialist Revolution Party [Workers' Word] (Partido de la Revolución Socialista [Palabra Obrera]), Argentina

International Committee of the Fourth International [1] (ICFI[1])

• Socialist Equality Party (SEP), Australia
• Party for Social Equality (Partei für Soziale Gleichheit, PSG), Germany
• Socialist Equality Party (SEP), Great Britain
• Socialist Equality Party (SEP), other page, USA

International Committee of the Fourth International [2] (ICFI[2])

• Workers' Revolutionary Party (WRP), Great Britain

International Communist League (Fourth Internationalist) (ICL(FI))

• Proletarian Platform (Platforma Proletariacka), Poland

International Liaison Committee for a Workers' International (Entente Internationale des Travailleurs)

• Workers' Party (Parti des Travailleurs, PT) unofficial, periodical Fraternité, Algeria
• Workers' Party (Parti des Travailleurs, PT), France
• Social Politics and Democracy (Soziale Politik und Demokratie), Germany
• The Struggle (Lalit), Mauritius
• Association for Workers' Emancipation (Asociatia pentru Emanciparea Muncitorilor) periodical Tribuna Socialã, Romania
• Workers Information (Información Obrera), Spain
  • Collective for Workers' Socialism (Colectivo por el Socialismo Obrero) 
  • Communist Encounter (Reencuentro Comunista)
• Union of Circles for Workers' Politics (Union des Cercles pour une Politique Ouvrière, UCPO), Switzerland
• Socialism without Bosses, General, Bureaucrats (Patronsuz, Generalsiz, Bürokratsiz Sosyalizm, PGB Sosyalizm), Turkey

International Secretariat of the Fourth International (Secrétariat International de la Quatrième Internationale)

• Labour (O Trabalho), periodical O Trabalho, Brazil
• Socialist Workers' Organization (Organización Socialista de los Trabajadores) youth organization, Mexico
• Workers' Party of Socialist Unity (Partido Operário de Unidade Socialista, POUS), Portugal
• Internationalist Socialist Workers' Party (Partido Obrero Socialista Internacionalista, POSI), Spain
• "Struggle" Union (Soyuz "Borot'ba"), Ukraine
• Socialist Organizer, USA

International Socialist Forum (ISF)

International Socialist League (Liga Socialista Internacional, LSI)

• Socialist Workers Party (Partido Socialista de los Trabajadores, PRT), Costa Rica
• Workers Party (Partido de los Trabajadores, PT), Honduras
• Revolutionary Workers Party (Partido Revolucionario de los Trabajadores, PRT), Nicaragua

International Socialists (IS)
other page

• Left Turn (Linkswende), Austria
• International Socialist Organisation (ISO), Australia
• Revolts (Revolutas), Brazil
• International Socialists / International Socialism (International Socialists/Socialisme International), Canada
• Workers' Democracy (Ergatiki Demokratia), Cyprus
• Socialist Solidarity (Socialistická Solidarita), Czech Republic
• International Socialists (Internationale Socialister), Denmark
• Socialist League (Sosialistiliitto, SL), Finland
• Socialism from Below (Socialisme par en bas), France
• Left Shift (Linksruck), Germany
• Socialist Workers' Party (SWP), Great Britain
• Socialist Workers' Party (Sosialistiko Ergatiko Komma, SEK), Greece
  • Anticapitalist Alliance (Antikapitalistiki Symmachia), Greece
• Socialist Workers Party (SWP), Northern Ireland
• Communism from below (Comunismo dal basso), Italy
• International Socialists (Internationale Socialisten), Netherlands
• Socialist Worker, New Zealand
• International Socialists (Internasjonale Sosialister), Norway
• International Socialists, Pakistan
• Workers' Democracy (Pracownicza Demokracja), Poland
• International Socialist Organization (Organización Socialista Internacional, OSI), Puerto Rico
• In Struggle (En Lucha), Spain
• Antikapitalist (Anti-capitalist), Turkey
• Revolutionary Socialist Workers Party (Devrimci Sosyalist Isçi Partisi, DSIP), periodical Sosyalist Isçi, Turkey
• Revolutionary Left (Izquierda Revolucionaria), Uruguay
• International Socialist Organization (ISO), Zimbabwe

Splits from International Socialists

• Socialist Action Group (SAG), Australia, split from SA
• Socialist Alternative (SA), Australia, split of ISO
• Solidarity, Australia, split from ISO
• New Socialist Group, Canada
• Active Socialist Forum (Aktivt Socialistisk Forum, ASF), Denmark, split of IS
• International Socialism (Socialisme International), France
• Anti-capitalist Network (Antikapitalistisches Netzwerk), Germany, split from Linksruck
• Group of International Socialists (Gruppe Internationaler SozialistInnen, GIS), Germany, Germany, split from Linksruck, now left communist
• International Socialists (Internationale Sozialisten), Germany, split of SAG, close to IS
• Internationalist Workers Left (Diethistiki Ergatiki Aristera, DEA), Greece, split from SEK
• International Socialist Organization (ISO), New Zealand, split from SWO, close to IS
• International Socialist Organization (ISO), USA, ex-IS
• Left Turn, USA, ex-IS

International Trotskyist Committee for the Political Regeneration of the Fourth International (ITC)

• Revolutionary Internationalist League (RIL) auxiliary organization, Great Britain
• Revolutionary Workers League (RWL), USA

International Trotskyist Labor Tendency (ITLT)

• Workers Front Organization, Great Britain
• Trotskyist Labor League (TLL)

International Trotskyist Opposition (ITO)

• International Trotskyist Opposition, Denmark, active inside SAP
• British Supporters of the International Trotskyist Opposition
• Our Word (Unser Wort), Germany
• Revolutionary Marxist Association "Communist Project" (Associazione Marxista Rivoluzionaria "Progetto Comunista"), Italy, active inside PRC

International Workers League (Fourth International) (Liga Internacional de los Trabajadores (Quarta Internacional), LIT-CI)

• Socialist Worker Front, Frente Obrero Socialista (FOS), Argentina
• Workers League, Australia
• Unified Socialist Workers' Party (Partido Socialista dos Trabalhadores Unificado, PSTU)
  • Movement for a New Socialist Party (Movimento por um Novo Partido Socialista), Brazil
• Movement for Socialism (Movimiento por el Socialismo, MPS), Chile
• Internationalist Socialist Group (Groupe Socialiste Internationaliste, GSI), France
• International Socialist League (ISL), Great Britain
• Socialist Workers' Party (Partido Obrero Socialista, POS), Mexico
• Workers' Party (Partido de los Trabajadores, PT), Paraguay
• Socialist Workers' Party (Partido Socialista de los Trabajadores, PST), Peru
• Breach/Front of the Revolutionary Left (Ruptura/Frente da Esquerda Revolucionária, Ruptura/FER), Portugal
• Internationalist Struggle (Lucha Internacionalista), Spain
• Revolutionary Workers' Party - Revolutionary Left (Partido Revolucionario de los Trabajadores - Izquierda Revolucionaria / Partit Revolucionari dels Treballadors - Esquerra Revolucionari, PRT), Spain
• International Bulletin (Enternasyonal Bülten), Turkey
• Workers Front (Isçi Cephesi) periodical Isçi Cephesi, Turkey

International Workers' Unity (Fourth International) (Unidad Internacional de los Trabajadores (Quarta Internacional), UIT)

• Socialist Workers' Movement (Movimiento Socialista de los Trabajadores, MST), Argentina
• Socialist Workers' Current (Corrente Socialista dos Trabalhadores, CST), Brazil
• La Commune Group (Groupe "La Commune"), France
• Union of the Working Class (Union de la Clase Trabajadora, UCLAT), Mexico

Internationalist Communist Union (Union Communiste Internationaliste, UCI)

• Communist Union (trotskyist), [Workers Struggle] (Union Communiste (trotskyste), [Lutte Ouvrière], LO), France
  • Faction of Workers Struggle (Fraction de Lutte Ouvrière) periodical Convergences Révolutionnaires
• Workers' Struggle (Combat Ouvrier), Guadeloupe/Martinique
• The Spark, USA

League for the Fifth International  (LFI)

• Workers' Standpoint Group (Gruppe ArbeiterInnenstandpunkt, ASt), Austria
• Socialist Workers Organization (Socialistická organizace pracujících, SOP), Czech Republic
• Workers' Power (Pouvoir Ouvrier, PO), France, dissolved in 2003
• Workers' Power Group (Gruppe Arbeitermacht, GAM), Germany
• Workers' Power, Great Britain
• Revolutionary Socialist League (Zväz revolucných socialistov, ZRS), Slovakia
• Workers Power (Arbetarmakt), Sweden

League for the Fourth International

• Fourth Internationalist League of Brazil (Liga Quarta-Internacionalista do Brasil, LQIB)
• Internationalist Group (Groupe Internationaliste), France
• Internationalist Group, USA

Liaison Committee for an International Conference of Principled Trotskyists and Revolutionary Internationalist Workers' Organizations

• Revolutionary Marxist Committee (Marxist Trench) (Comitê Marxista Revolucionário (Trincheira Marxista)), Brazil
• Workers' Oppostion (Oposição Operária), Brazil

• Liaison Committee of Militants for a Revolutionary Communist International (LCMRCI)

Communist Workers Group (CWG), mirror page, New Zealand

Internationalist Trotskyist Faction - Fourth International (Fracción Trotskista Internacionalista - Cuarta Internacional)

• Internationalist Workers League (Fourth International) - Workers' Democracy (Liga Obrera Internacionalista (Cuarta Internacional) - Democracia Obrera), Argentina, split of PTS

Fourth Internationalist Tendency (Tendência Quarta Internacionalista, TQI)

• Construction Committee for a Revolutionary Workers' Party (Comité Constructor por un Partido Obrero Revolucionario), Argentina
• Trotskyist Faction (Fração Trotskista), Brazil

Liaison Committee for the Reconstruction of the Fourth International (Comité de Enlace por la Reconstrución de la IV Internacional, CERCI)

• Revolutionary Workers' Party [Masas] (Partido Obrero Revolucionario [Masas], POR[Masas]) periodical Masas, Bolivia

Leninist-Trotskyist Tendency (LTT)

• Workers Action, Great Britain

Movement (Movimiento)

• Socialist Left Movement (Movimento Esquerda Socialista), Brazil
• Socialist Workers Unity (Unidad Obrera y Socialista, UnioS!), Mexico

Permanent Revolution Collective (Collectif Révolution Permanente / Colectivo Revolución Permanente)

• Bolshevik Group (Groupe Bolchevik) France
• Germinal Group - In Defense of Marxism (Grupo Germinal - En Defensa del Marxismo), Spain

Posadist Fourth International

• Revolutionary Worker's Party (Trotskyist) (Parti Ouvrier Révolutionnaire Trotskiste, POR(T) periodical Lutte Ouvrière, Belgium
• Posadist Current of the Workers Party (Corrente Posadista do Partido dos Trabalhadores) periodical Revolução Socialista, Brazil
• Revolutionary Communist Party (Trotskyist) (Parti Communiste Révolutionnaire (Trotskiste), PCR(T)) periodical Lutte Communiste, France

Revolutionary Workers Ferment (Fomento Obrero Revolucionario, FOR) other page

Socialism or Barbarism

• Movement towards Socialism (Movimiento al Socialismo, MAS), Argentina
• Socialism or Barbarism (Socialismo o Barbarie), Bolivia
• Avanti!, France

Socialist Workers Party Tendency
Tendency around the Socialist Workers Party (SWP) of the USA
Periodical Militant

• Communist League (Kommunistiska Förbundet) bookstore, Sweden
• Socialist Workers' Party (SWP) periodical Militant, USA

Trotskyist Faction (Estrategia Internacional) (Fracción Trotskista (Estrategia Internacional), FT(EI)), European page

• Workers' Party for Socialism (Partido de Trabajadores por el Socialismo, PTS), Argentina
• Revolutionary Workers' League for the Fourth International (Liga Obrera Revolucionaria por la Cuarta Internacional, LOR-CI), Bolivia
• Revolutionary Strategy (Estratégia Revolucionária), Brazil
• Revolutionary Trotskyist Militants (Militantes Trotskistas Revolucionarios) periodical Clase contra Clase, Chile
• Workers' League for Socialism - Against the Current (Liga de Trabajadores por el Socialismo - ContraCorriente, LTS-CC), Mexico

Trotskyist Posadist Fourth International

• Revolutionary Workers' Party (Partido Obrero Revolucionario, POR), Uruguay

United Secretariat of the Fourth International (USFI)
Periodicals International Viewpoint, Inprecor, Inprekorr, Inprecor America Latina

Member Organizations

• Socialist Workers Party (Parti Socialiste des Travailleurs / Akhabar Anemlay Nikhedamen /Hizb al-Ummal al-Ishtiraki, PST), Algeria
• Socialist Workers' Party (Socialistische Arbeiders Partij / Parti Ouvrier Socialiste, SAP/POS), Belgium
• Socialist Democracy (Democracia Socialista) periodical, Brazil
  • Freedom and Revolution (Liberdade e Revolução) Brazil
• Socialist Left (Gauche Socialiste, GS), Canada/Quebec
• Socialist Workers' Party (Socialistisk Arbejderparti, SAP), Denmark
• Revolutionary Communist League (Ligue Communiste Révolutionnaire, LCR)
  • Arguments for Socialism (Arguments pour le Socialisme)
  • Avanti!
  • International Socialism (Socialisme International)
  • Militant Debate (Debat Militant)
  • Workers Voice (Voix des Travailleurs, VdT)
• International Socialist Left (Internationale Sozialistische Linke, ISL), Germany
• Revolutionary Socialist League (Revolutionär Sozialistischer Bund, RSB), Germany
• International Socialist Group (ISG), Great Britain
• Organization of Communist Internationalists of Greece-Spartacus (Organosi Kommouniston Diethniston Ellados-Spartakos, OKDE-Spartakos)
• Socialist Revolution Group (Groupe Révolution Socialiste, GRS), Guadeloupe/Martinique
• Socialist Democracy, Ireland
• Bandiera Rossa Association (Associazione Bandiera Rossa, ABR), periodical Erre, Italy
• Socialist Convergence (Convergencia Socialista), Mexico
• Socialist Alternative Politics (Socialistische Alternatieve Politiek), Netherlands
• Internationalist League of Norway (Forbundet Internasjonalen i Norge, FIN)
• Revolutionary Socialist Political Association (Associação Política Socialista Revolucionária, APSR) periodical Combate, Portugal
• Political Education Workshop (Taller de Formación Política, TFP), Puerto Rico
• Alternative Left (Izquierda Alternativa, IA) periodical Viento Sur, Spain
• Collective for an Alternative Left (Col.lectiu per una Esquerra Alternativa, CEA), Spain/Catalonia
• New Equal Society Party (Nava Sama Samaja Pakshaya, NSSP), Sri Lanka
• Socialist Party (Socialistiska Partiet, SP), Sweden
• Socialist Alternative / Solidarity (Sozialistische Alternative / Solidarität, SOAL), Switzerland

Sympathising Organizations

• Socialist Democracy, Australia
• Socialist Action, Canada
• October Review Group (Shih Yueh P'ing Lun), English articles, China/Hongkong
• Japan Revolutionary Communist League (Nihon Kakumeiteki Kyôsanshugisha Dômei, JRCL)
• National Council of Internationalist Workers (Kokusaishugi Rôdôsha Zenkoku Kyôgikai), Japan
• Socialist Unity League (Liga de Unidad Socialista, LUS), Mexico
• Militant (Al-Mounadhil), Morocco
• Revolutionary Left Current (Nurt Lewicy Rewolucyjnej, NLR), Poland
• Socialist Action, USA

Organizations including USFI supporters

• New Socialist Group, Canada
• Movement of the National Left (Muvimentu di a Manca Naziunale), France/Corsica
• Association for Solidarity Perspectives (Verein für Solidarische Perspektiven), Germany
• Movement for a Reunionese Alternative to the Neoliberal Order (Mouvement pour une Alternative Réunionnaise à l'Ordre Néolibéral, MARON)
• Act Together/African Party for Democracy and Socialism (And Jëf/Parti africain pour la Démocratie et le Socialisme, AJ/PADS), Senegal
• Alternative Space (Espacio Alternativo), Spain
  • Alternative Galicia (Galiza Alternativa)
  • Alternative Left (Izquierda Alternativa, IA) periodical Viento Sur
  • Alternative Space (Espai Alternatiu)
  • Andalusian Revolutionary Space (Espacio Revolucionario Andaluz)
  • Rainbow (Arcoiris)
  • Shock (Batzac)
• Stand up (Zutik), Spain/Basque Country
• Movement for Socialism (Bewegung für den Sozialismus / Mouvement pour le Socialisme / Movimento per il Socialismo, BFS/MPS) regional groups, Switzerland
• Freedom and Solidarity Party (Özgürlük ve Dayanisma Partisi, ÖDP), Turkey
• Labor Standard, mirror page, USA
• Solidarity, USA

Others

• Revolutionary Socialism (Socialismo Revolucionario), Argentina, split from PTS
• Revolutionary Socialist League (Liga Socialista Revolucionaria, LSR), Argentina, split of MAS
• Socialist Workers' Union (Unión Socialista de los Trabajadores, UST), Argentina
• Democratic Socialist Perspective (DSP), Australia, ex-USFI
• Workers' Liberty, Australia, linked to British AWL
• Anti-fascist Left (Antifaschistische Linke, AL), Austria
• Group for Revolutionary Workers Politics (Gruppe für Revolutionäre Arbeiter/innenpolitik, GRA), Austria
• Working Group Marxism (Arbeitsgruppe Marxismus, AGM), Austria
• Internationalist Bolshevik League (Liga Bolchevique Internacionalista, LBI), Brazil
• Socialism and Freedom Collective (Coletivo Socialismo e Liberdade), Brazil
• Socialist Voice, Canada
• Pioneer, China/Hongkong, ex-USFI
• Workers' Power (Poder Obrero), Colombia
• Revolutionary Socialists (Ishtirakiyin al-Thawriyin), Egypt
• Circle for the Construction of the Revolutionary Workers Party, of the Revolutionary Workers International (Cercle pour la Construction du Parti Ouvrier Révolutionnaire, de l'Internationale Ouvrière Révolutionnaire), France
• Committee for the Construction of the Revolutionary Workers' Party (Comité pour la Construction du Parti Ouvrier Révolutionnaire), France
  • Public Faction "Fighting for Socialism" (Fraction Publique "Combattre pour le Socialisme"), France
• Federation of the Circles "Le Marxisme d'Aujourd'hui" (Fédération des Cercles "Le Marxisme aujourd'hui"), France
• Internationalist Revolutionary Communist Group (Groupe Communiste Revolutionnaire Internationaliste, Groupe CRI), France
• New Communist Left / Popular Association for Mutual Aid (Nouvelle Gauche Communiste / Association Populaire d'Entraide), France
• Revolutionary Convergences (Convergences Révolutionnaires), France, Étincelle faction of Lutte Ouvrière and former Révolution! faction of LCR
• Marxist Theory and Politics Working Group (Arbeitskreis "Marxistische Theorie und Politik"), Germany, ex-LTT
• Alliance for Workers' Liberty (AWL), Great Britain, linked to Australian Workers' Liberty
• International Socialist Movement - Marxist Platform of the Scottish Socialist Party (ISM), Great Britain, formerly in CWI
• Revolutionary Democratic Group (RDG), Great Britain
• Socialist Action Group periodical Socialist Action Review, Great Britain, ex-USFI
• Communist League - Workers Power (Kommounistikos Syndemos - Ergatiki Exousia), Greece
• Organization of Communist Internationalists of Greece - Workers Struggle (Organosi Kommouniston Diethniston Elladas - Ergatiki Pali, OKDE), close to USFI
• Communist Project - Programatic Area of the PRC (Progetto Comunista - Area Programmatica del PRC), Italy
• Reds Association (Associazione Reds), Italy
• Fourth International Central Secretariat (Dayon Intânashonaru Chûô Shokikyoku), Japan
• Fourth International Japan Section Reconstruction Preparation Group (Dayon Intânashonaru Nihon Shibu Saiken Jumbi Gurûpu), Japan
• Japan Revolutionary Communist League, National Committee/Middle Core Faction (Kakumeiteki Kyôsanshugisha Dômei, Zenkoku Iinkai/Chûkakû-ha, Chûkakû-ha)
• Japan Revolutionary Communist League - Revolutionary Marxist Faction (Nihon Kakumeiteki Kyôsanshugisha Dômei - Kakumeiteki Marukusushugi-ha, Kakumaru-ha)
• Kenya Socialist Democratic Alliance (KSDA)
• Labour Party Pakistan (LPP), formerly in CWI
• Workers' Tribune Group (Grupo Tribuna Obrera), Paraguay
• Spartacist Communist Group of the Portuguese Workers (Grupo Espartaquista Comunista do Operariado Português, GECOP)
• Revolutionary Workers Party (Revoliutsionnaya Rabochaya Partiya, RPP), Russia
• Revolutionary Workers Party (Revoliutsionnaya Rabochaya Partiya, RRP), Russia
• Communist (Komunist), mirror page, Serbia and Montenegro
• Workers International Vanguard League (WIVL), South Africa
• In Defence of Marxism (En Defensa del Marxismo), Spain, close to ITO and PO-Tendency
• Marxist League (Liga Marxista), Spain/Canary Islands
• Marxist Propaganda Group (Grupo de Propaganda Marxista, GPM), Spain
• New Clarity (Nuevo Claridad), Spain, ex-CWI
• Revolutionary Workers' Party (Partido Obrero Revolucionario/Partit Obrer Revolucionari, POR), ex-UIT, Spain
• Socialist Alternative (Socialistiskt Alternativ), split from Arbetarmakt, Sweden
• Workers' Democratic Association (Gongren Minzhu Xiehui, WDA), Taiwan
• Liberation Party of Kurdistan (Partîya Rizgarîya Kurdistan / Kürdistan Kurtulus Partisi, PRK/Rizgari), Turkey
• Workers Struggle (Isçi Mücadelesi), Turkey
• Freedom Socialist Party (FSP), USA, Canada, Australia
• Labor's Militant Voice, mirror page, USA, split from Labor Militant (CWI)
• Socialist Workers Organization (SWO) periodical Socialist Viewpoint, USA, split from Socialist Action
• Truth, ex-UIT, USA
• Workers Democracy Network, USA

Ex-Trotskyists

Marxists-Humanists

• Corresponding Committee periodical Hobgoblin, Great Britain
• Freedom Council (Anjoman Azadi), Iran
• News & Letters Committees, USA

Socialist Utopia (Utopia Socialista)

• Revolutionary Socialism (Socialismo Rivoluzionario, SR), ex-LIT-CI
• Libertarian Socialism (Socialismo Libertario), Spain

Others

• Revolutionary Workers' Party (Partido Revolucionario de los Trabajadores, PRT), Argentina
• Revolutionary Communist League (Revolutionär Kommunistische Liga, RKL) periodical Bruchlinien
• Group of International Socialists (Gruppe Internationaler SozialistInnen, GIS), Germany, split from Linksruck
• Movement for a Socialist Future (MSF), Great Britain
• Peace and Progress, Great Britain, ex-Marxist Party
• Red Action, Great Britain
• Workers World Party (WWP), USA