A tiling window manager for X11
A "Window Manager" usually refers to something a bit more bare bones. As another poster mentioned, i3 is a very popular choice. Being bare bones, however, an actual WM is probably going to be a bit more command line heavy and have a bit more of a learning curve. That's why I assume you're asking about DEs, not WMs.
Caja, the file manager for the MATE desktop (by mate-desktop)
If you want a full-featured solution, you're talking about a desktop environment. You have several good options there: GNOME, Plasma, and Cinnamon are very popular (if a bit more resource heavy) ones. Popular lighter desktop environments include XFCE and MATE.
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The core of xmonad, a small but functional ICCCM-compliant tiling window manager
As far as wms go, I always liked fluxbox and xmonad. Openbox has its fans, and i3 is very popular. I prefer a de over a wm but I know a lot of people use i3.
Sources for https://arewewaylandyet.com
I do like Sway, but before diving in remember that we're not fully Wayland yet.
Are there RDP apps for Wayland? (debian12, gnome, wayland)
1 project | reddit.com/r/wayland | 7 Feb 2023
Someone explain to me why I should switch from i3wm to hyprland
1 project | reddit.com/r/hyprland | 5 Feb 2023
X.Org vs. Wayland Linux Gaming Performance For NVIDIA GeForce + AMD Radeon In Early 2023
2 projects | reddit.com/r/linux_gaming | 30 Jan 2023
wayland? more like waitland
1 project | reddit.com/r/linuxmemes | 23 Jan 2023
Hyprland, a dynamic tiling Wayland compositor that doesn't sacrifice on looks
5 projects | news.ycombinator.com | 14 Jan 2023