@ohuu What's "independent science"? Infrastructure is not for free, indeed. That said, depending on subject, there are services like ADS and for physics and astronomy the preprint server arxiv. Similar exists afaik for medicin (pubmed), and possibly similar for other sciences (dunno). If you have an abstract it's also always an option to contact the authors.
@planetmaker it's just science done outside of a university or other scientific institution. It's difficult to be part of those communities if you're not affiliated with them.