Top rated in E-mail
Email notifier; it works in cooperation with your server to notify you immediately when new mail comes in.
With PageSender you can fax or email anything you can print.
Share contacts and address book information using a central LDAP directory.
HeavyMail Looks and Feels Like Email.
It is a script that creates to-do items from Mail messages.
Smart tool that displays you your unread messages.
Reader Notifier is a small menubar utility that fits in nicely along the official Google Notifier icons for Mac.
Redirects mailto: links in your browser to bring up a new message in Yahoo!Mail.
Snail Mail allows ad-hoc manual entry of addresses directly onto the envelope.
I can't stand getting those emails from somewhat minor acquaintances...
Mail Factory Home Edition has all necessary tools to fulfill any domestic mailing needs.
Note: Versions 2.1.3 (for OS X 10.7), 3.0.6 (for OS X 10.8), 4.0.8 (for OS X 10.9)...
Archive MS Entourage mail to DEVONThink Pro.
New open-source mail client for Mac OS X.
Rulebox makes sure that mail sent from people you know goes to the right mailbox
It is an app to remote-check POP3 Mailboxes and fully manage their messages.
Mail Saver has a new name and a new icon...
It sends automated replies to people who are writing to you while you're away.
MBOX Breaker could split your existing mailbox into smaller files.
MailBackup X keeps the mail of entourage in every folder.
Entourage emails, especially those hit by the 2GB limit bug
Industrial-strength mass e-mailing application
POPFile is an email classification tool with a Naive Bayes classifier.
GMailFS Drive literally adds a new drive to your computer