Gmail Peeper is a free desktop Gmail notifier program which provides an attractive and simple way to check for new e-mail messages without opening your browser. It is using Gmail secured RSS feed to retrieve the new mails from Gmail server. Gmail Peeper is silently running in system tray and has very light system resource usage. You can specify time interval for checking new emails, and enable/disable option to start it with Windows logon.
Gmail notifier for Windows is available in Spanish, English, German and Estonian language and works on Windows 7, Windows Vista and Windows XP