telnet client

Imesh Turbo is a powerful, full-featured, cross-platform Java based client.

Jfbchat offers you a facebook chat client directly from your desktop

CrossFTP is a FTP and Amazon S3 client.

microblogging client that currently supports Twitter and Koornk

Enterprise multi-network instant messaging client.

A lightweight local network chat client.

jafoClient is a client for the Uptimes Project. It reports uptime statistics.

Fully featured high fidelity voice email client. Completely free.

Koma-Mail is an email client which is very comfortable+has many useful functions

Yet another IM client.