All Linux distributions

Distrowatch
https://www.distrowatch.org

Linux Kernel
https://www.kernel.org

Commercial version

Ubuntu
The most used on the desktop
https://www.ubuntu.com

Suse
Owned by Microsoft, at the begining from Germany
https://www.suse.com

Redhat
The most used in the enterprise
https://www.redhat.com

Deepin
Design Desktop China
https://www.deepin.org/

Derivated version

OpenSuse
Sponsored by Suse
https://www.opensuse.org

Fedora
Sponsored by Redhat
https://getfedora.org

CentOS
Sponsored by Redhat
https://centos.org

LinuxMint
Derived von Ubuntu
https://www.linuxmint.com

MXLinux
https://mxlinux.org

PopOS (System76 Vendor Distribution)
https://system76.com/pop

Free version Normal Release

Debian
Very stable for Servers use, Packages a little bit old
https://www.debian.org

Mageia
Fork of Mandriva, Entirely free
https://www.mageia.org

Free version Rolling Release

ArchLinux
The most updated (Bleeding Edge)
https://www.archlinux.org

Manjaro
Based on ArchLinux, The packages arrive later as ArchLinux
https://manjaro.github.io

EndeavourOS
https://endeavouros.com

Security Version

Kali Linux
https://www.kali.org