ERC is a powerful, modular, and extensible Internet Relay Chat (IRC) client distributed with GNU Emacs since version 22.1.

ERC comes with the following capabilities enabled by default:

* Timestamps * Flood control * Join channels automatically * Buttonized URLs, nicknames, and other text * Wrap long lines * Highlight or remove IRC control characters * Highlight pals, fools, and other keywords * Detect netsplits * Complete nicknames and commands in a programmable fashion * Make displayed lines read-only * Input history * Track channel activity in the mode-line