Graphic notifier for Mail
Copy Mail message properties to clipboard
Smart mailboxes for your contacts
Take command of your POP3 mail accounts
Best Mail.app friend. All you messages in menubar.
Collection of useful AppleScripts for Mail and Address Book
Forward your POP mail to any e-mail address
Mail Call is a full feature mail notifier for email accounts that support IMAP.
Safeguard your mails with easy to use Universal Mail Backup / Archiver / E-mail Viewer for Mac OS X
Incoming e-mail at a glance