RBTray - Allows almost any program to be minimized to the system tray by right clicking its minimize button.
Virtual Audio Cable - Ever wanted to record your speaker output? (loopback) This is for you.
4t Tray Minimizer - 4t Tray Minimizer Free/Pro - Minimize Outlook, Internet Explorer, Firefox, Chrome and any other applications to the system tray!
Loopback by RogueAmoeba - Get all the power of a high-end studio mixing board, right inside your Mac!
SmartSystemMenu - SmartSystemMenu extends system menu of all windows in the system
JACK Audio Connection Kit - JACK Audio Connection Kit|Home