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Eggdrop is an open-source Internet Relay Chat bot that was originally designed to help IRC operators protect their channels from takeover attempts. Eggdrop can also network other Eggdrop bots into a botnet. It is written in C and offers extension capabilities in Tcl. It is designed to run on Unix-like systems.
Eggdrop is one of the most popular bot programs on IRC. It was created by Robey Pointer in 1993 to protect the EFnet channel #gayteens from constant attacks in 1993. Writen in C, Eggdrop can be extended using Tcl scripts. Many Eggdrop users have added scripts doing things like running online games, managing users and channels, serving files and other IRC services. Eggdrop is typically used on shell account providers so users can compile and run the program.
One notable feature is the ability to form botnets of other instances of Eggdrop. These bots communicate with each other using DCC chat and telnet.
An Eggdrop user compiles Eggdrop from source on a shell provider that allows Eggdrop. Because of the potential for abuse by using botnets for things like distributed denial of service attacks, some IRC servers ban Eggdrop.