List of Top 15 GMail Notifiers for Windows, Mac and Linux

List of GMail Notifiers for Windows:

1. GMail Notifier
2. GAlert
3. GMail Counter
4. Gmail Notifier
5. GmailGeiger

List of GMail Notifiers for Linux:

1. KCheckGMail
2. cGmail
3. Gmail Notifier
4. Firefox Addon Gmail Notifier
5. CheckGmail

List of GMail Notifiers for Mac:

1. GmailStatus
2. GMail Notifier
3. Google+Growl
4. Mail Checker
5. Gee