With AllTray you can dock any application with no native tray icon (like Evolution, Thunderbird, Terminals) into the system tray.A high-light feature is that a click on the "close" button will minimize back to system tray. AllTray works well with Gnome, KDE, XFCE 4, Fluxbox and WindowMaker.

Ссылка: http://edge.lau..ray/trunk/0.7.4dev/+download/alltray-0.7.4dev.tar.gz