telnet client

JabberIM is a client designed for the Jabber Instant Messaging platform.

FTP, SFTP, WebDAV client, use remote storage just like a local drive!

Send email from command line is a lightweight, command line SMTP email client.

SendEmail is a lightweight, command line SMTP email client.

Allow a client complying with the XML for Analysis (XMLA) version 1.1

Allow a DDE client application to send commands to a DDE server.

Allows you to recover deleted emails from Mozilla Thunderbird email client.

Mailsmith is an Internet email client designed by Macintosh users, for Mac.

User-friendly FTP client and server can browse FTP servers like Windows Explorer

FlexMail is a powerful email client designed for Windows Mobile