Xfce Embed Plugin enables the embedding of arbitrary application windows into the Xfce panel. The window is resized into the panel space available, and the associated program can be automatically launched if it is not open. Example uses include embedding an instant messaging buddy list, a mail client's new mail ticker, a simple media application, or a fancy clock or timer. Combining with Xfce's ability to auto-hide panels can make this very convenient.
Equake Xfce is a panel plugin for the Xfce panel which monitors earthquakes and displays an update each time a new earthquake occurs. In addition, it can show alerts when heavy earthquakes have happened, display maps and webpages with more information, produce lists of hourly and daily earthquakes, and update a handy signature file you can use in your email messages. Many features are user-configurable.