AllTray is described as 'Program you can use on Unix-like systems such as GNU/Linux or FreeBSD running the X Window System to dock any application which doesn’t have a native tray icon into the system tray/notification area' and is an app. There are more than 10 alternatives to AllTray for a variety of platforms, including Windows, Linux, PortableApps.com, Thunderbird and X11 apps. The best AllTray alternative is SmartSystemMenu, which is both free and Open Source. Other great apps like AllTray are KDocker, RBTray, Actual Window Manager and 4t Tray Minimizer.
Clicky Gone allows you to hide your selected windows from view, this includes the taskbar button associated with the application. This utility particularly helps with protecting your privacy by hiding things like your browser with banking details up and someone walks in on you.
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.
MinimizeToTrayTool is a utility that allows the user to minimize any application to the Windows system tray with its icon.
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