(pull)Mail programs(/pull)

Foxmail - http://fox.foxmail.com.cn/english/
i.Scribe - http://www.memecode.com/
Mahogany Mail - http://mahogany.sourceforge.net/
Pegasus Mail - http://www.pmail.com/
PopTray - http://www.poptray.org/
Thunderbird - http://www.mozilla.org/projects/thunderbird/

(pull)Instant Messengers(/pull)

AMSN - http://amsn.sourceforge.net/index.php
Gaim - http://gaim.sourceforge.net/
Google Talk - http://www.google.com/talk/
IM2: http://www.im2.com
Mercury Messenger - http://www.mercury.to/
Miranda IM - http://www.miranda-im.org/
Pandion - http://www.pandion.be/
PSI - http://psi.affinix.com/
qip - http://www.qip.ru/
Skype - http://www.skype.com/
SIM - http://sim-icq.sourceforge.net/
TerraIM - http://terraim.sourceforge.net/
Trillian Basic - http://trillian.cc/downloads

(pull)IRC Clients(/pull)
BersIRC - http://www.bersirc.com/
BitchX - http://bitchx.org/download.php
HydraIRC - http://www.hydrairc.com/
NodeIRC - http://node.sourceforge.net/
TinyIRC - http://www.tinyirc.net/
XChat - http://www.silverex.org/news/