Manjaro is an Arch-based, rolling-release Linux distribution aimed at users who want the power and flexibility of Arch, without complications. The latest release, version 21.3.0, includes plenty of newness, in the form of the Calamares installer (which now supports LUKS partitions), GNOME 42 (which includes Libadwaita), KDE Plasma 5.24 (which includes the new Overview), XFCE 4.16 (which now supports fractional scaling), and Linux kernel 5.15 LTS.
The GNOME edition of Manjaro 21.30 includes both GTK 4 and Libadwaita, which offers improved performance, a modern UI style, and plenty of new user interface elements. The Plasma edition makes it possible to more easily move panels around and stick them to any edge you like. The XFCE edition received quite a number of updates, especially in the area of compositing and GLX.
Since Manjaro is a rolling edition, if you already have the OS installed, an update should bring you to the latest release. If you don’t have Manjaro installed, you can download the latest ISO from the official Manjaro Download page, where you have the choice to download the full or a minimal version of the OS. You’ll find downloads for x86_64 and ARM architecture as well as unofficial spins for the Budgie, Cinnamon, i3, Sway, Mate desktops, and even a Docker image.