It's a respin of Void GNU/Linux, created to demonstrate the capabilities of Void's tools, such as void-mklive and void-packages.
Originally initiated as a Void respin with Fluxbox it has evolved to offer a wide range of options, including the window managers awesome, bspwm, dwm, fluxbox, herbstluftwm, hyprland, i3wm, JWM, labwc, leftwm, niri, openbox, qtile, river, sway, wayfire and the desktop environments, Cosmic, LXQt and XFCE.
Two user accounts are provided: anon and root, both with the password 'voidlinux'.
The distribution can be installed using tui d77void-installer.
If you'd like to see the system in action, you can view a demonstration video by searching for "d77void" on YouTube.