Marxist/Leninist and Maoist, specifically, if I understand correctly. There are other, less harmful forms of communism though, such as my version, Anarkikomunismolando (or, at least hopefully it is much less harmful!), which attempts to bring about a gift economy simply by not charging taxes (which causes people to need to make money), and, in the resulting state, manufacture lots of things to give away for free. To be fair, my idea was inspired by the open source community rather than any previous ideas of communism, so perhaps it doesn't count!

Communism, by itself, is the idea that people should own the means of production and give things to each other for free, without state intervention; the problematic ideologies are those that try to achieve this in totalitarian, authoritarian ways. Sadly, the less authoritarian varieties have not, generally, succeeded on a large scale anywhere other than the digital realm; in the digital realm, however, open source projects like Linux and Wikipedia have embraced the gift economy in full. I hope that Anarkikomunismolando can help create at least a partial gift economy in the physical world, and hopefully help let people contribute to open source digital projects without worrying about bills too.