Q4OS is a small GNU/Linux distribution based on the latest Debian GNU/Linux operating system and built around the Trinity Desktop Environment (TDE). It’s explicitly designed to make the Microsoft Windows to Linux transition accessible and more straightforward as possible for anyone. Dubbed Debonaire, the new desktop theme uses dark-ish elements for the window titlebar and panel. Somehow it resembles the look and feels of the acclaimed Arc GTK+ theme, and it makes the Q4OS operating system more modern than the standard look offered by the Trinity Desktop Environment.