apple mail

You can Preview new unread mail with MOAppsMailBoy

AppleScript-able spam tracing/reporting tool for Mail.

A e-mail merge, email extractor, data parser and all in one email utility

Speed up Mail.app.

The must have mail notifier for OS X.

Take control of your voice, video, IM, text, social media, e-mail, fax

An extreme effective spam and virus filter for the Communigate Pro® mail server

Smart Mailboxes for your contacts in Mac OS X's Mail.

Label maker with mail merge and barcode features.

Enterprise-class open source mail/calendaring client.