RBTray - Allows almost any program to be minimized to the system tray by right clicking its minimize button.
4t Tray Minimizer - 4t Tray Minimizer Free/Pro - Minimize Outlook, Internet Explorer, Firefox, Chrome and any other applications to the system tray!
Minime - Minime is a tool that allows you to minimize applications to the system tray using a simple hotkey.
SmartSystemMenu - SmartSystemMenu extends system menu of all windows in the system
GhostTile - Hide your running applications from Dock.
Clicky Gone - Clicky Gone allows you to hide your selected windows from view, this includes the taskbar button...