Hide my Windows Alternatives
Hide my Windows is described as 'HMW is a free program to hide away the Windows on your desktop. With HMW you can set any program Window as hidden, while the program itself will run silently in the background. Additionally all the Hotkeys used can be customized to your needs' and is an app. There are three alternatives to Hide my Windows for Windows, X11, Linux and PortableApps.com. The best alternative is Clicky Gone, which is both free and Open Source. Other great apps like Hide my Windows are mapmywindows and HideWin.
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.
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A small program to show and hide windows in X window system. Most Linux distributions use a display server with X window system, you can easily hide and show windows using this program.
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mapmywindows vs Hide my Windows opinions
TheDcoderIt is directly inspired by this program and has similar functionality. It aims to provide a good alternative for linux (and potentially other unix users)
HideWin sits in the system tray and enables you to hide any top-level window with its popup tray menu or an ALT+letter hotkey that it assigns automatically. It appears to be abandonware, but it is only 13KB and still works.
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DiscontinuedThe official website is no longer available. Last version, 1.0, released on June 13th, 2008, can be still downloaded from Softpedia.