This list was originally put together by the Venezuelan anarchist collective El Libertario, I've found the original dubs and tried to find versions with english subtitles (Versions without english subtitles are marked NS, you can find srt files on OpenSubtitles):
The Wave (2008) - German film that portrays the rise of Nazism amongst a group of students. Based on a real United States experiment. [NS]
https://vimeo.com/404096663
Libertarias (1996) - Film about the role played by the anarcha-feminist group Mujeres Libres in the middle of the Spanish Civil War.
https://archive.org/details/libertarias_1996
Land and Freedom (1995) - Film based on 'Homage to Catalonia' by George Orwell.
https://archive.org/details/LandAndFreedomFullFilm
Salvador (2006) - Dramatic film about the attempt by family and friends to prevent the Franco regime's execution of the Catalan anarchist Salvador Puig Antich. [NS]
https://www.veoh.com/watch/v21166172GzK9Bae5
The Green Beautiful (1996) - The film portrays a utopian planet where its inhabitants develop themselves as they get rid of the hindrances of the modern world. [NS]
https://archive.org/details/labelleverte1996thegreenbeautifuldvdripx264highcode
Simón, Hijo Del Pueblo (2013) - Documentary that recreates the historical memory around Simón Radowitzky. [NS]
https://archive.org/details/SimonHijoDelPueblo
Lucio (2007) - Documentary about the anarchist bricklayer Lucio Urtubia.
https://archive.org/details/luciourtubia_201911
The Anarchist's Wife (2008) - Film about a passionate woman who must search for her anarchist husband after the Spanish Civil War. [NS]
https://invidio.us/watch?v=ODoXlf348Ho
Manuel (1991) - A Spanish refugee in Canada, picks up Manuel, a twelve-year-old Portuguese teenager, who he teaches to read, to assert his rights and to whom he talks about the Spanish civil war. [NS]
https://invidio.us/watch?v=6cMtwLZ2K-s
Animal Farm (1954) - Animated film based on the Orwell novel.
https://archive.org/details/animalfarm1954_20190809
Hombres de ideas avanzadas (2011) - Documentary about the Catalan anarchist Penina, who was shot by the Argentine military. [NS]
https://invidio.us/watch?v=ysf9x6YHqA8
Sacco & Vanzetti (1971) - Film about the process that the US government unfairly carried out against two anarchist workers.
https://archive.org/details/sacco.and.vanzetti.1971
Joe Hill (1971) - Film about the poet and singer Joe Hill, member of the IWW and persecuted by the US government.
https://invidio.us/watch?v=LKcPpEGBaGQ
Libera, My Love (1975) - Italian film that portrays the anarchist struggle against the rise of fascism. [NS]
https://invidio.us/watch?v=cLLtq04M3tI