yahoo email

It periodically checks your IMAP server for new email

Screaming fast email client.

Notifies you when a sent email has been read.

Menubar email notifier with Growl support.

Automated email archiving and viewing tool.

Print/email a directory listing of a certain folder.

Use Mail-Grab to extract email addresses

Notify is an awesome email notifier for Mac OS X.

Send any size file: uploads and creates email with download link in one step.

Balzac is an email application for OS X 10.4 and above