Speed Send Mailer - Send multiple e-mail messages at lightning speed.

The Bat - Access multiple e-mail accounts, use comprehensive filtering, or protect your letters with internal PGP.

VisNetic MailFlow - Manage incoming e-mail intelligently by tracking and routing incoming customer mail to appropriate employees.

VisNetic OddPost - Combine functionality of a desktop e-mail client and accessibility of Web-based e-mail.

VsMail Client - Retrieve and manage your e-mails from multiple accounts.

WorldMerge - Send customized e-mail to a large number of recipients.

X-Mailer Direct - Maintain e-mail lists based on recipients' interests and send e-mail with relevant information.

xTang - Manage your mail, protect your inbox from spam, and check spelling in various languages.

Xtreeme FollowUpXpert Professional Edition - Create e-mail autoresponse systems for an unlimited number of mailboxes.

Xtreeme MailXpert - Create multiple mailing lists with this easy mailing list server.