Xfce - Xfce is a lightweight desktop environment for UNIX-like operating systems. It aims to be fast and low on system resources, while still being visually appealing and user friendly.
LXDE - Why will you like it? Less resource needs. You can use it on your less-pricey embedded board or salvaged computer. Component-based design. Don't want something in LXDE, or you don't want to use LXDE but only part of it?
Budgie Desktop - Budgie Desktop is a familiar, modern desktop environment. - GitHub - BuddiesOfBudgie/budgie-desktop: Budgie Desktop is a familiar, modern desktop environment.
KDE Plasma Desktop - Plasma Workspaces is the umbrella term for all graphical environments provided by KDE.
i3 - A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.
Cinnamon Desktop - Cinnamon is a Linux desktop which provides advanced innovative features and a traditional user experience.