Irssi

Irssi
Original author(s)Timo Sirainen
Developer(s)The Irssi team
Initial releaseJanuary 1999 (1999-01)
Stable release
1.4.5  / 3 October 2023
Repository
Written inC, Perl
Operating systemCross-platform
TypeIRC client
LicenseGPL-2.0-or-later
Websiteirssi.org

Irssi (Finnish pronunciation: [ˈirsːi] (listen)) is an Internet Relay Chat (IRC) client program for Linux, FreeBSD, macOS and Microsoft Windows. It was originally written by Timo Sirainen, and released under the terms of the GNU GPL-2.0-or-later in January 1999.

The program has a text-based user interface was written from scratch using C. It may be customized by editing its config files or by installing plugins and Perl scripts. Though initially developed for Unix-like operating systems, it has been successfully ported to both Windows and macOS.