IM-Filter is a daemon that runs on a firewall and filters ICQ traffic. The daemon can identify file transfers, handle UIN and word blacklists, manage a list with currently logged in users, and log messages sent via the ICQ protocol. The modular design allows implementation of other protocols like MSN or IRC.
LarryMessenger is a simple to install and easy to use cross-platform instant messenger client. It has a nice graphical user interface, and allows people to communicate over a LAN with static IP addresses without the need for a central server. Furthermore, it provides functions to query the ICQ and AIM networks.
Bicq is an attempt to bring connection to ICQ services to the popular BitchX IRC client. It uses BitchX's built-in plugin system to allow users to connect to and chat on the ICQ system as well as the IRC networks. It runs entirely inside the BitchX application, and uses that application's standard interface with its provided commands.