blue mail

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

Enterprise-class open source mail/calendaring client.

MailFX is a notifier which replaces (or complete) the sound warning of Mail OSX.

Export new Mail.app message to iCal calendars.

Export Mail.app message to iCal ToDo list.

Add cards in Address Book from selected Mail messages.

A plugin for Apple Mail that shows messages

IMAPCheck is a bundle for Mail.app

Plugin for Mail.app takes advantage of widescreen monitor.

A new open-source mail client for Mac OS X.