telnet client

Nettalk is a powerful but easy to use free (open source) IRC-client for Windows.

Popcorn is a lightweight and portable e-mail client for Windows.

LDC++ is a client for Direct Connect network.

KueL-FTP is an easy to use, free FTP client program.

Azureus is a free Java based BitTorrent client

Quassel IRC is a modern, distributed IRC client based on the Qt4 framework.

emule client which enhanced emule Xtreme Mod

SmVDC++ is a client for the direct connect network based on Airdc++.

Kommute is a cross platfrom file sharing client using the anonymous network MUTE

Bulk Email Client for Sending Personalized Text or HTML Messages