Canonical | The company behind Ubuntu
Kubuntu | Friendly Computing
Xubuntu
Ubuntu Studio
Ubuntu Suomi
JAAS - Juju as a Service | Juju
Ubuntu GNOME | An official flavor of Ubuntu, featuring the GNOME desktop environment.
Ubuntu中国官网, IoT物联网, 服务器和云端的领先开源操作系统 | Ubuntu
MAAS | Metal as a Service
Snapcraft - Snaps are universal Linux packages