Incus

Some time ago, most of the LXD team at Canonical were laid off, and LXD was removed from containers.org.  Incus was forked from LXD and, so far as I'm concerned, is the future of containers on Linux.  It also manages KVM VMs too.  Granted, I'm not much of a fan of application containers.  Here's a video announcing the release of Incus 6.0 LTS.  Enjoy!