$ sudo pkg_add -r xfce4
Xfce is a free software desktop environment for Unix and other Unix-like platforms, such as Linux, Solaris and BSD. It aims to be fast and lightweight, while still being visually appealing and easy to use. It is based on the GTK+ 2 toolkit (as is GNOME). Its configuration is entirely mouse-driven, and the configuration files are hidden from the casual user.
$ sudo pkg_add -r kde
KDE (K Desktop Environment) is a free software project which aims to be a powerful system for an easy-to-use desktop environment. The goal of the project is to provide basic desktop functions and applications for daily needs as well as tools and documentation for developers to write stand-alone applications for the system.
$ sudo pkg_add -r gnustep
GNUstep is a free software implementation of NeXT's OpenStep Objective-C libraries (called frameworks), widget toolkit, and application development tools not only for Unix-like operating systems, but also for Microsoft Windows. It is part of the GNU project.
$ sudo pkg_add -r linux-seamonkey
SeaMonkey is a free, open source, and cross-platform Internet suite that is the continuation of the former Mozilla Application Suite. It consists of a Navigator which is a descendant of the Netscape family; a Mail and Newsgroups client program, and an HTML editor, or Composer program.
$ sudo pkg_add -r pidgin
Pidgin (formerly named Gaim) is a multi-platform instant messaging client that supports many commonly used instant messaging protocols. Pidgin is free software available under the GNU General Public License.
$ sudo pkg_add -r gnome
GNOME is an international effort to build a complete desktop environment-the graphical user interface which sits on top of a computer operating system-entirely from free software. This goal includes creating software development frameworks, selecting application software for the desktop, and working on the programs which manage application launching, file handling, and window and task management.
$ sudo pkg_add -r etoile
Étoilé is a GNUstep-based free software desktop environment built from the ground up on highly modular and light components with project and document orientation in mind, in order to allow users to create their own workflow by reshaping or recombining provided Services (aka Applications), Components, etc.
$ sudo pkg_add -r gimp-app
The GNU Image Manipulation Program, or GIMP, is a raster graphics editor used to process digital graphics and photographs. Typical uses include creating graphics and logos, resizing and cropping photos, altering colors, combining multiple images, removing unwanted image features, and converting between different image formats.
$ sudo pkg_add -r abiword
AbiWord is a free software word processor licensed under the GNU General Public License. The name "AbiWord" (pronounced "Abby Word") is derived from the root of the Spanish word abierto, meaning "open". It is supported on Linux, Mac OS X (PowerPC), Microsoft Windows, ReactOS, BeOS, AmigaOS 4.0 (through its Cygnix X11 engine), and other operating systems.
Software descriptions taken from their respective Wikipedia articles