ntalk is a chatapplication. It works in a client-server model and it's designed to work in all kinds of networks. ntalk was written to be much more easy-to-use, friendly and functional than Unix talk.
Kntalk is a gui client written using KDE.
JTC (Java To Cli) is a tool for developers that will enable their web-based application to be managed by remote unix command-line by revealing API layer of the java application in the linux command line. Detailed documentation is in the downloaded pack
OpenChatterBox is an LANChat-like application which is designed for communicating over LANs. It uses a protocol similar to the ChatterBox utility for Windows, but doesn't support colors, pictures, or user modes yet.