Application Finder (xfce4-appfinder) – Application to quickly run applications and commands

Configuration Storage System (xfconf) – D-Bus-based configuration storage system

Desktop Manager (xfdesktop) – Configure the desktop background image, icons, launchers and folders

Development Tools (xfce4-dev-tools) – A set of scripts and m4/autoconf macros that ease build system maintenance.

Helper Applications (exo) – Manage preferred applications and edit .desktop files

File Manager (thunar) – The fast and easy to use file manager for the Xfce Desktop

Menu Library (garcon) – Library used for menu implementation

Panel (xfce4-panel) – Application launchers, window buttons, applications menu, workspace switcher and more

Power Manager (xfce4-power-manager) – Manage power sources and power consumption of devices

Session Manager (xfce4-session) – Save the state of your desktop and restore it on the next startup

Settings Manager (xfce4-settings) – The Settings daemon which persists many Xfce settings

Thumbnail Service (tumbler) – A D-Bus service for applications to request thumbnails for various URI schemes and MIME types

Utility Sharing Library (libxfce4util) – Used to share commonly used non-GTK+ utilities among the Xfce applications.

Widget Sharing Library (libxfce4ui) – Used to share commonly used Xfce widgets among the Xfce applications

Widget Abstraction Library for X11 & Wayland (libxfce4windowing) – Used to present windowing concepts (screens, toplevel windows, workspaces, etc.) in a windowing-system-independent manner.

Window Manager (xfwm4) – Handles the placement of windows on the screen