Talk of the Town: Instant Messaging Smorgasbord
AOL Instant Messenger 5.2: The most popular IM client doesn't do video or SMS messaging to cell phones; it does display ads.
Gaim 0.72: A free, open-source universal IM client, Gaim supports AIM, ICQ, MSN, Yahoo, and IRC; it has just basic features, though.
ICQ Pro 2003b: This feature-rich, ad-supported client connects to both AIM and ICQ clients; it sends SMS messages but doesn't support voice or video chat.
ICQ Lite: The streamlined version of ICQ contains a subset of ICQ Pro's features.
IMsecure/IMsecure Pro Trial Version: Zone Labs' free IM security utility protects you from various threats that standard firewalls and antivirus programs miss.
MSN Messenger 6.1: Microsoft's IM client software for Windows versions other than XP supports voice, video, and SMS chat.
Trillian Basic 0.74F: This free universal IM client lacks ads and supports AIM, ICQ, MSN, Yahoo, and IRC protocols; no voice or video chat.
Windows Messenger: This client, compatible with MSN Messenger, is available only as a component of Windows XP; it supports voice, video, and SMS chat.
Yahoo Messenger: Often overlooked, this IM client does it all--voice, video, and SMS chat--with fewer ads than other systems carry.