This thought came to me in the shower today. Open source checks most of the boxes. It is a collaborative, worker owned (develloper-owned) project, that tries to flatten hierarchy. Especially if you look at something like Debian ), which really tries to have a bottom-up structure.
Of course, there are exceptions, considering there are a lot of corporate open-source projects, that are not democratically maintained and clearly only serve the interest of the company, who created it (like chromium for example).
So I am mainly talking about community-oriented FOSS projects here.
And if you were to agree with my statement, would you say that developing FOSS software is advancing the goals of the anarchist / communist project, because it is laying the groundwork infrastructure needed for a new kind of economy and society?
Thought this could be an interesting discussion!
I suggest you read some Marxist literature. Marxism has become a bad word in the West because it undermines exploitation under capitalism. But everything Marx and Lenin espoused was based on improving the rights of individuals (you could make a convincing argument that the structure of the Soviet Union was incapable of accomplishing that goal, but that it got closer than anything American capitalism has been able to).
My personal rec is State and Revolution by Lenin. It's short and easy to read.