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.
dircproxy is an IRC proxy server ("bouncer") designed for people who use IRC from lots of different workstations or clients, but wish to remain connected and see what they missed while they were away. You connect to IRC through dircproxy, and it keeps you connected to the server, even after you detach your client from it. While you're detached, it logs channel and private messages as well as important events, and when you reattach it'll download those logs to you using ordinary IRC protocol.
libircclient is a small but powerful library that implements the client-server IRC protocol. It is designed to be small, fast, portable, and compatible with RFC standards and most IRC clients. It includes multi-threading support, sync and async interfaces, CTCP and DCC support, and color support. Good documentation and examples are available.
TR-IRCD is an ircd and a collection of services programs for IRC networks. The ircd is heavily influenced by ircd-hybrid and Bahamut. It includes support for IRC extensions such as md5-encrypted hostnames, modules, threads, different protocols, channel modes, and languages. It supports IPv6 and Web-based configuration, and includes a proxy scanner.
ircproxy is an Internet Relay Chat Proxy, which works as a layer between your IRC client and the IRC server. It features bouncer capability and has more features, flexibility, and configuration options than other tools. It also includes an option to use the system password list instead of requiring a separate password database.
pork is an ncurses-based AOL instant messenger client. It uses the OSCAR protocol (the one the Windows client uses) to access AIM. Pork features Perl scripting, an online help system, the ability to configure nearly all aspects of the program's look and feel, an alias system, and a powerful, fully configurable key binding system. It supports being logged in with more than one screen name at the same time. The default look and feel of the client is modeled after the ircII IRC client. Anyone comfortable using ircII (or any clients derived from it, e.g. epic, BitchX, etc.) will feel comfortable using pork.
The Bahamut IRCD is based on the EFNet Hybrid IRCD and has many additional features primarily designed for the DALnet IRC network. Its features include very high performance, compatibility with Solaris, BSD and Linux and a high level of stability under very high load, as well as many improvements over the original EFNet code. Bahamut is not compatible with Dreamforge as of version 1.2.0.
Darkbot is a very fast and small IRC bot written in C. Originally created as an aid for help channels to answer repeated questions from its virtually unlimited database, it has became a very popular talking robot in a generic sense, being used all over IRC networks for different purposes and in 18 languages. Data can be added to it and managed dynamically online or edited in its database files offline. An extensive but easy-to-understand list of commands and features, including some channel operation functions and levels of protection, makes Darkbot a very flexible but somehow powerful and complex robot, with almost human conversations and reactions.
BitchX is the premiere IRC (Internet Relay Chat) client. It originally was a modified version of the popular ircII client, and the features were eventually merged into the EPIC IRC client. The current development is aimed at merging the client back to a current branch of EPIC and bringing compatibility and stability back to the client, while bringing the features that are BitchX into a new client.