
eXtra Buttons
eXtra Buttons lets you add up to 10 additional buttons to the title bar of each window, which allow you to minimize the window to the tray, keep it on-top, send it to the background, adjust the window's transparency and more.
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...
HideWin sits in the system tray and enables you to hide any toplevel 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.
Productivity Developer Tools Utilities
portable Discontinued window-manager desktop-enhancement minimize-to-tray hide-window hide-all-windows