4t Tray Minimizer Pro   
by 4t Niagara Software   

4t Tray Mimimizer lets you run applications minimized as System Tray icons, which helps free up space on your taskbar. To minimize an application to the task bar, simply left click the minimize button as usual or press keyboard shortcut. You can configure 4t Tray Minimizer to automatically hide/restore specific applications by pressing specific keyboard shortcut.
MAIN FEATURES
minimizes MS Outlook Express, Internet Explorer and any other applications to tray
hide any application
minimizes multiple instances of application into the one icon like Windows XP
customizes minimizing behavior for your favorite applications
various ways to restore minimized application fast
minimizes and restores all instances of you favorite application by keyboard shortcut at a time
activates you favorite application by keyboard shortcut
launches you favorite application by pressing keyboard shortcut
maximizes and minimizes window of application by pressing keyboard shortcut