The idea of free software isn’t political; ie socialist/communist. Free software is also compatible with free market capitalism. In a capitalist market free of coercion there is nothing that stops one from copying something then changing and/or selling it.
If you make a microwave and I buy one and reverse engineer it then I could produce and sell it just fine. Similarly, if you created a program called Adobe Photoshop, and I got a hold of the code, then I could copy and resell it. Neither capitalism nor the free market has a concept of patents or copyrights which are a political thing. Everything is free to reproduce.
Making the software free is just the logical economic price of a product with a marginal cost very close to zero. Give it away and let everyone build on top of it to make increasingly better things because that is the most efficient way to manage those resources. It’s like the progression of science. We give credit for discovery, but encourage all science to happen in the open so others can take the ideas and build on them without being encumbered.
I hope you don’t think that science is socialist/communist.
Note: After going through the trouble of writing this I became concerned that my use of the loaded term “free market capitalism” could be misunderstood so I’ve decided to define my terms. Free market capitalism isn’t a form of government. Capitalism just means stuff can be privately owned. A market is how capital is coordinated. The free refers to the market transactions being voluntary/free of coercion. So free market capitalism is the “voluntary coordination of private capital”. That definition can exist under varying forms of government which is why I argue that it isn’t a political system in itself.