PopTray's main window allows you to quickly check for new mail and displays brief information about messages like subject, date, size, etc. 

PopTray allows you to setup multiple pop3 accounts to check. You can choose a different color, email program and notification sound for each one. 

PopTray's Settings window - Interval tab allows you to setup the time interval the program checks for new messages. 

PopTray's Settings window - General Options tab allows you to setup various program options like check for new mail on startup, start minimized, animated tray icon and more.