Gmail notifier allows you to receive Gmail notifications instantly right from the Windows taskbar.

This Open Source app sits in the systray and runs in the background providing you with a notification when a new Gmail message has been received and then can permit you to check your messages as well as reply to them quickly. After the initial setup process that includes providing your Gmail info, Gmail notifier will sync your data allowing systray checking of your inbox. It also will let you know how many unread messages are waiting for you. If you want to go into your Gmail account, all you need to do is double-click the systray icon. It can be additionally configured to open with the New Message window first providing you with a time-saving option when responding to new mail.

Gmail notifier is straightforward and simple to configure to match your needs. Also if you tend to receive numerous emails throughout the day, you can disable the notifications to allow yourself a break.