IRK is a Tcl IRC client library. IRK is intended for Tcl programmers that want to use the IRC protocol for communication. It can be used to ease the creation of IRC "bots", to serve as the basis for graphical chat clients, and to allow IRKs to find each other without centralized coordination by meeting on a designated IRC server and channel. This last feature makes it ideal for negotiating the initial contact of P2P programs without requiring a central registry or server.
Extended Tcl (TclX) is an extension to Tcl, the Tool Command Language invented by Dr. John Ousterhout. Tcl is a simple and powerful embeddable programming language. Extended Tcl is oriented toward system programming tasks and large application development. TclX provides additional interfaces to the operating system. It also adds many new programming constructs, text manipulation tools, and debugging tools.