Mac OS Gmail Notifier
Just tested this little freeware called Gmail Notifier. Maybe it’s good if you’re too lazy to even configure the Mail (Default email client), it works just the same, but it read and compose on webpage like normal anyway.
The bad thing or the thing that Gmail Notifier work like Mail are, they cannot watch only certain labels, every email received will be notifier like normal email. So some junk mail also got the chance to be notified too! Nonetheless, Gmail Notifier is not email client so I can’t delete email right from Gmail Notifier for Mac OS X 
I am lazy to oppen browser sometimes, both FireFox and Safari seems to be heavy memory leaking. I ended up deleted the Gmail Notifier, as they act exactly the same as Mail and I have a lot of email accounts to take care of.
