Linux Containers is the virtualization method that allows running multiple Linux systems (containers) on a single host system. LXC is built around the kernel's cgroup support and other kernel features to provide its own process and network space. LXC 1.0 is the user-space components to Linux Containers and this release comes after a long development cycle.
LXC 1.0 has been in development for nearly one year with over a thousand commits and provides support for fully unprivileged containers, a public stable API, API bindings for Lua and Python 3 along with out of tree support for Go and Ruby, and a flexible backing-store system with support for ZFS and Btrfs among other file-systems. LXC 1.0 can also support cloning and snapshotting of containers, various updates, and support for templates.
More details on LXC 1.0 can be found via the LinuxContainers.org site.