The KDE desktop is represented by the "plasma-desktop" package and the Xfce desktop by the "xfdesktop" package. The Apache web server is listed as "httpd" and the Linux kernel is listed as "linux". For indication about the GNOME version, please check the "nautilus" and "gnome-shell" packages.
(Versions prior to 18.10 shipped with the LXDE desktop.) It includes essential applications and services for daily use, including office suite, PDF reader, image editor and multimedia players. Lubuntu is a variant of Ubuntu that uses the LXQt desktop environment.