> I can really only name a handful of projects that are widely used and of high quality that have not been largely funded by commercial world: OpenSSH, some other BSD stuff, what else?

Is this perhaps though a result of most projects allowing donations, and some companies (e.g. Google) having a lot of capital to throw around and funding them more-or-less just because? Would Linux not still exist in a similar form to today?

Also, I would add things like the GNU project, and notably VLC media player, alongside OpenSSH and the BSD stuff.

I agree with your final point, though. I can't actually think of a company whose product only in-house FOSS software. Red Hat, Suse, Purism, etc are building off community code, not something primarily developed internally. And companies like MongoDB make all of their money off of non-free cloud products.

One that I can think of that was once like this, the Subsonic media player, actually went closed source due to too many people re-hosting the code and not paying the maintainer.