CheckGmail is an alternative Gmail Notifier for Linux and other *nix systems. It is fast, secure and uses minimal bandwidth via the use of Atom feeds.
CheckGmail is a system tray application that checks a Gmail account for new mail. When new mail is present the tray icon changes, an optional animated popup is displayed and a tooltip displays the number and details of new messages. Configuration is GUI-based and the application is designed to be simple, elegant and unobtrusive.