View selective HTML-Mail
Provide CalDAV & CardDAV for TbSync
Provide Exchange ActiveSync (EAS v2.5 & v14.0) synchronization capabilities
Reminder for emails
Create templates for Thunderbird
Thunderbird/Lightning Add-On to support MS Exchange Calendar etc.
Persistent sticky notes for Thunderbird
mail/news reader supporting IMAP for emacsen
mail/news reader supporting IMAP for emacsen (development version)
monitor mailboxes and/or newsgroups
Transition Package, xcite to elpa-xcite
Displays an image for each piece of mail in your mailbox
mail notification pop-up with configurable message scans
display Mail User Agent extension for Thunderbird