I’ve.com)piled a list of.com)munity-driven, non-corporate FOSS operating systems. What I mean by .com)munity-driven" is distributions that are self-governed, where decisions regarding the direction of the distribution are ultimately made by the.com)munity itself and its leadership. This is in contrast to distributions that are beholden to corporations like IBM/Red Hat, Canonical, and Novell.
Linux
AlmaLinux
Alpine Linux
Arch Linux
Artix Linux
CachyOS
Chimera Linux
Debian GNU/Linux
Devuan GNU+Linux
GNU Guix System
Gentoo Linux
Hyperbola GNU/Linux-libre
Linux Mint
MX Linux
Parabola GNU/Linux-libre
Qubes OS
Rocky Linux
Slackware
Tails
Void Linux
antiX Linux
postmarketOS
BSD
DragonFly BSD
FreeBSD
HardenedBSD
NetBSD
OpenBSD