Binary package “alltray” in ubuntu trusty

Dock any program into the system tray

 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. It works well with GNOME,
 KDE, Xfce 4*, Fluxbox* and WindowMaker*.
 (*) No drag 'n drop support. Enable with "-nm" option.