HiddeX - Tiny portable freeware application for Windows that can easily hide any window, program, browser or...
task-homie - Completely hide auto-hidden Windows taskbars
Taskbar Hide - Taskbar, Application Window and System Tray Icon Hider.
Hide Taskbar - Tiny app to hide the Windows taskbar using keyboard shortcuts
WinHide.SB - The program to control the visibility of windows.
Anti Boss Key - Free screen privacy tool, Instantly hide any program when your boss comes around the corner