upIRC (formerly apIRC) is a fully RFC-compliant client for Internet Relay Chat (IRC) servers. It includes a full range of features, including DCC chat support, command shortcuts with variables, auto-completion of commands, and a one-tap shortcut for entering nicknames in channels.
123 Flash Chat Server is a full-featured chat server for high-load Web sites. It features a range of customization options, and can be smoothly integrated with the database of almost all leading CMS or forum systems including Joomla!, phpBB, skadate, and vBulletin. It includes plain text chat and video chat options, and is scalable enough to fit the needs of small business and large enterprises. A free 10-user edition is available. It's based on a Java server and a Flash client, but also has various alternative clients based on technologies such as HTML/AJAX, so it can run on many platforms, including iPhone and iPad. It features avatars, smilies, Flash emotions, voice messages, entering multiple rooms, dynamic skins, loading external avatars and profiles, and a media player. The HTML 5 client significantly improves the chat performance in terms of loading speed, video layout, and user interface.
Chiron was written to demonstrate that you could embed special tokens in an infobots fact file so that recalling/matching a fact causes novel/interesting and hopefully useful behaviour. The 'tokens' gradually gained functionality, and now the factoids themselves are fully programmable. A tracing feature is used to automatically follow instructions, generate the code, and then learn it as a fact. There are many other features, including a hooking system for plugging multiple backend engines in to process what it sees, etc. The current problem with the program is the lack of documentation.
Pound is an IRC app that runs without rooting on Palm WebOS. It accomplishes this by bouncing off existing installations of qwebirc. It can connect to any IRC network that hosts a qwebirc daemon, or you can host your own. It supports multiple networks and channels. This is a preview release, intended for developers and the curious. It is usable but not ready for mainstream usage yet.
Quassel IRC is a modern, cross-platform, distributed IRC client, meaning that one or more clients can attach to and detach from a central core, much like the popular combination of screen and a text-based IRC client, but graphical. In addition to this unique feature, it aims to be a comfortable chatting program.