Eggdrop is the oldest Internet Relay Chat (IRC) bot still in active development.
Originally created by Robey Pointer in December 1993 for use on a channel called #gayteen, it has spawned an almost cult like following of users.
It is a feature rich program designed to be easily used and expanded upon (using Tcl scripting) by both novice and advanced IRC users on a variety of hardware and software platforms.

Eggdrop is freely available for anyone to copy, distribute and/or modify under the terms of the GNU General Public License (GPL).

Some features of Eggdrop:

• Basic IRC channel administrative functions (authorized operators, ban lists, flood control)
• Runs on Linux, *BSD, SunOs, Mac OS X, etc…
• IPv6 support
• SSL protection of IRC and botnet traffic
• An official Docker Eggdrop image
• Base functionality can be extended with customized Tcl scripts, Python scripts, and/or C modules
• The ability to form botnets and share partylines and userfiles between bots
• A robust documentation, forum, and online support community
• Support for all major IRCDs, and pre-configured settings for major networks (Libera, Undernet, Efnet, Dalnet, Quakenet)