Also called "Chat Programs". These applications are installed on a PC by a user, and allow immediate "chats" between other users of the program. Some of these programs also allow audio or video conferencing as well as the ability to execute file transfers.
123 Flash Chat Server is a live multilingual chat room Java server which integrates popular 3rd-party CMS or forum systems. Created to use mainly for high-load chat events such as social networking sites and online conferencing.