Still powered by the long-term supported Linux 4.1 kernel and built around the lightweight and highly customizable Xfce 4.12 desktop environment, Manjaro Linux Xfce 15.09 Release Candidate 3 is here to fix last-minute bugs, as well as to update several core components and applications to their latest versions as of September 15, 2015.
There are improvements to the command line installer, to the Thus graphical installer, and introduces the Calamares graphical installer. It also begins support for kernel 4.3.
More at Softpedia.
Edit: I've also just seen that it is built around the KDE 5.4.1 Plasma desktop.