International Communist Party
- Left communist formation in Italy that originated from the left of the Italian Socialist Party, and its paper during the First World War called il soviet.
- http://perso.orange.fr/italian.left/

n + 1
- Historical archives of the "Italian" Communist Left who founded the Party in Italy and opposed the degeneration of Third Communist International.
- http://www.quinterna.org/

International Bureau for the Revolutionary Party
- Founded by the Communist Workers Organisation (Britain) and the Partito Comunista Internazionalista, the IBRP promotes the left communist ideas of Amadeo Bordiga and publishes the journal International Communist.
- http://www.ibrp.org/

Love and Treason
- A collection of documents of revolutionary extremist agitation and propaganda produced between 1982 and 2001. Influenced by the Conspiracy of Equals, Marx, left communism, the Situationist International and class struggle anarchism.
- http://www.infoshop.org/myep/love_index.html

sinistra.net
- Archives of the communist left.
- http://www.sinistra.net/

Intervention of OCI
- Internationalist Communist organization (Organizzazione comunista internazionalista OCI) is a Marxist revolutionary tendency of working class that publishes the magazine che fare.
- http://www.tightrope.it/user/chefare/intervention.htm

Break Their Haughty Power
- Loren Goldner's leftist essays and interventions over the years, and notices from Queequeg Press.
- http://home.earthlink.net/~lrgoldner

International Communist Current
- The origins of the ICC lie in the left communists expelled from the 3rd International as it degenerated - the Italian, German, and Dutch lefts. These groups defended proletarian internationalism against participation on either side in World War II, just a
- http://www.internationalism.org