The ArchiveOS.org data base grows up systematically in the last few months time, and got the number of 200 operating systems now.
The biggest category which features the biggest number of open-source and free operating systems is Linux by now. But it doesn’t mean that I don’t search the web looking for *BSD, DOS, Solaris and others, independent operating systems. I do, and I will be doing it as long as I could.
Anyway, if you have an interesting, old or out of date operating system, or you know a hosting server where it can be downloaded – let me know , please so I will add it to the ArchiveOS.org base soon.