Dubbed Atom Heart Mother, Semplice Linux 4 brings beautiful new artwork and visual effects, which consists of a new default theme, a new wallpaper, as well as the Faenza icon theme. Being powered by Linux kernel 3.2.41 and based on Debian Sid, Semplice Linux 4 features the lightweight and super fast Openbox 3.5.0 window manager, the Chromium 26.0.1410.43 web browser, Exaile 3.3.1, PCManFM 1.1.0, ClipIt clipboard manager, GNOME MPlayer 1.0.6, Abiword 2.9.2, Gnumeric 1.12.1, Pidgin 2.10.7 instant messenger, Guake Terminal 0.4.3, and GTK+ 3.6.