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One of the best windows multiple desktop tools - mDesktop


It's free and open source. enjoy it.
mDesktop is a lightweight application that allows the user to utilize multiple virtual desktops. Also, mDesktop integrates with Hotcorners. mDesktop currently supports up to ten virtual desktops.
Instructions:
Holding Alt-Desktop Index (e.g. Alt-1, Alt-2...) switches between desktops
Keystroke Alt-Ctrl-Desktop Index sends the active window to selected window (e.g. Alt-Ctrl-2 sends active window to the second virtual desktop)
Right Clicking on tray icon and selecting option "Hide Icon" hides the mDesktop tray icon while the application is still running, allowing you to have a "boss" workspace.

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