Windows Instant Messaging Software and Services
AOL Instant Messenger
AOL Instant Messenger lets you exchange quick, no-frills text messages with your buddies in a simple manner. It's great to see that AIM supports encrypted communication.
ICQ offers a simple and quite efficient way to exchange text, voice or video messages with ICQ and AIM users or send SMS.
Miranda IM is an extremely powerful and highly usable instant messaging client that shines with broad protocol support, a lean and fast design and countless plug-ins that expand Miranda's capabilities.
MSN Messenger for Windows
MSN Messenger for Windows is a feature-rich yet really easy to use instant messaging application that can also be great fun.
Trillian Basic lets you chat, audio conference and send files in all the major instant messaging networks.
Yahoo! Messenger with Voice
Yahoo! Messenger is a complete messaging solution that integrates text and high quality voice messages, webcam video, chat rooms and lots of fun (games, audibles, avatars, radio, and more).