instant mail

Audio mixing software with instant iTunes access.

LAN instant messaging.

Group chat and instant messaging for teams and small businesses.

Internet phone and instant messenger (was SIP Communicator).

Organize instant online meetings with HD video conferencing and content sharing.

Encrypt instant messages with Open-Source security.

Popular instant messaging client supports a plethora of services.

Secure instant messenger.

Highly Secure Email, Chat, Instant Messaging, and Collaboration.

OpenC6 is a Linux and Mac OSX free instant messenger.