Revolutionary Catalonia and the Paris Commune are interesting examples of libertarian socialism. You could also look at the Korean People's Association [1], Rojava more recently [2], or the Zapatista Autonomous Municipalities in Chiapas (EZLN), which seem to be exceptional in having lasted 30 years or so.[3]
[1] https://en.wikipedia.org/wiki/Korean_People%27s_Association_...
[2] https://en.wikipedia.org/wiki/Rojava
[3] https://en.wikipedia.org/wiki/Rebel_Zapatista_Autonomous_Mun...