Battery – A battery monitor panel plugin for Xfce4 compatible with APM and ACPI, for Linux and *BSD.

Calculator – a calculator plugin for the Xfce4 panel.

Clipman – A clipboard manager for Xfce

Cpufreq – shows information about the CPU governor and frequencies supported and used by your system.

Cpugraph – offers multiple display modes (LED, gradient, fire, etc…) to show the current CPU load of the system.

Datetime – shows the date and time in the panel, and a calendar appears when you left-click on it.

Diskperf – displays instant disk/partition performance (bytes transferred per second).

Embed – Embed arbitrary application windows into the panel.

Eyes – Eyes that spy on you.

Fsguard – checks the chosen mountpoint for free disk space.

Genmon – spawns the indicated script/program, captures its output (stdout) and displays the resulting string into the panel.

Indicator – small plugin written by Mark Trompell to display information from various applications consistently.

Mailwatch – multi-threaded, multi-mailbox, multi-protocol plugin for checking mails periodically.

Mount – a mount/umount utility for the panel.

Mpc – client plugin for MPD, the Music Player Daemon

Netload – displays the current load of the network interfaces, currently works on Linux, *BSD, Sun Solaris, HP_UX and MacOS X.

Notes – provides sticky notes for your desktop.

Places – a menu with quick access to folders, documents, and removable media.

PulseAudio Plugin – Adjust audio volume and control media players on the Xfce desktop

Sample – Sample plugin developers can use as a base for new panel-plugins

Sensors – a hardware sensors plugin for the panel.

Smartbookmark – allows you to do a search directly on Internet on sites like google or debian bugzilla.

Statusnotifier – provides a panel area for status notifier items (application indicators).

Stopwatch – Keep track of elapsed time.

Systemload – Displays the current CPU load, the memory in use, the swap space and the system uptime.

Timer – Lets the user run an alarm at a specified time or at the end of a specified countdown period.

Time-out – for taking breaks from the computer every X minutes.

Verve – A comfortable command line plugin for the Xfce panel.

Wavelan – Display stats from a wireless lan interface (signal state, signal quality, network name (SSID)). It supports NetBSD, OpenBSD, FreeBSD, and Linux.

Weather – Shows the current temperature and weather condition, using weather data provided by xoap.weather.com.

Whiskermenu – A menu that provides access to favorites, recently used, and searching installed applications.

Xkb – Setup and use multiple (currently up to 4 due to X11 protocol limitation) keyboard layouts.