Miranda is another great Portable Instant Messenger application. Like Pidgin, it supports AIM, ICQ, IRC, MSN and Jabber, however, Miranda also sports a plugin system that allows you to include other popular instant messaging protocols like Gadu-Gadu, Netsend, Skype, Yahoo and more. The unique plugin system also allows the user to add additional features such as Clock, Weather and RSS Feed Reader. This Instant Messaging application can also be run portably from a USB flash drive or other portable device.
Miranda Portable IM Screenshot:
Authors Website: miranda-im.org/
License: Open Source
Download: Get Miranda HERE