checkgmail 1.13+svn43-4fakesync1 (amd64 binary) in ubuntu cosmic

 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.