KDocker is described as 'Will help you dock any application into the system tray. This means you can dock Openoffice, xmms, Firefox, Thunderbird, anything!' and is an app. There are more than 10 alternatives to KDocker for a variety of platforms, including Windows, PortableApps.com, Linux, Thunderbird and X11 apps. The best KDocker alternative is SmartSystemMenu, which is both free and Open Source. Other great apps like KDocker are RBTray, 4t Tray Minimizer, DM2 and The Wonderful Icon.
Stalonetray is a stand-alone system tray (notification area) for X Window System/X11. Working with virtually any EWMH-compliant window manager, it has minimal build and run-time dependencies (X11 lib only). Complete XEMBED support under development.
SilentRun is a small and handy Windows system software tool that can easily let you run multiple programs silently in the background. It can hide program windows and interfaces, and increase or decrease the priority of background processes.
China
MinimizeToTrayTool is a utility that allows the user to minimize any application to the Windows system tray with its icon.
Greece
EU