InspIRCd is a modular C++ IRCd (IRC daemon) for Linux, BSD, Windows and Apple OS X systems created to provide a stable, modern, and lightweight IRCd written from scratch.
As InspIRCd is one of the few IRCd projects written from scratch, it avoids a number of design flaws and speed issues that plague other more established IRCd projects with the same or less features, such as UnrealIRCd 3.
InspIRCd is one of the few IRCd projects to provide a vast number of features in the form of modules through the use of an advanced, well documented module API.
By keeping the functionality of the main core to a minimum we hope to increase the stability and speed of our IRCd project and make it customisable to the needs of many users.
InspIRCd is designed primarily to be a custom IRCd for the ChatSpike IRC network however we are releasing this free IRCd to the public under the GNU GPL so that you may benefit yourself from our work.
If you have any questions about InspIRCd, or feature requests, patches etc, you may contact our development team by connecting to our IRC support channel at irc.inspircd.org.

Requirements: Internet connection

What's new in this version: A few years in the making, months in the testing, thousands of lines of code in the writing, we're finally done. 1.2.0 is ready for every day usage. A grand total of 0 issues have been reported since rc5, so we are confident that things should have settled down now, though we will remain ready to rectify any problems that arise. 1.2 aims at following on from the surge in popularity following our stable 1.1 series. A number of new features have been introduced, borrowing on ideas from many other parts of the IRC community, as well as introducing a few of our own. Some performance enhancements and many architectural improvements have also been made. 1.2.0 is now recommended for usage. Networks that do not require any of the new features are still free to run 1.1, which is still supported. To download the tarball, visit: http://www.inspircd.org/?p=download&version=1.2.0 (if you're using wget, *QUOTE THE URL*) New features include: Support for channel extended bans with many different extended ban types available to use - any channel restriction (like +S for stripping colours) can also apply as an extban Reworked configuration files that are easier to understand and make InspIRCd easier to configure. Limits such as max nick length, max channel length and so on are configurable via the inspircd.conf rather than at compile-time. Support for IRCd-level fantasy commands such as !op in m_alias. Support for hybrid's +g callerid mode. m_shun is now an official module Ability to save all xlines (/cban, /qline, any command level ban) to a xline.db file so if you only have one server, you don't lose all your bans if the server goes down. Support for pluggable regular expression modules including Glob, POSIX, TRE and PCRE. Penalty ("fakelag") system to better discourage users from flooding the server. Availability of privsets for opers and the ability to set what oper-only user modes and channel modes a oper class can set. Support for custom casemapping in nicknames and across the network. Ability to hash more than just oper passwords. You can now have hashed <connect> block passwords and restart and die passwords. Support for permanent channels. When a oper sets channelmode +P on a channel, if everyone leaves, the channel stays open, keeps all its channel bans, topic and is still displayed in /list. Many SSL features such as linking using a SSL fingerprint as authentication, opering with a SSL fingerprint as authentication, requiring opers to use SSL to oper up and more were added with the m_sslinfo module. Support for customisable oper prefixing (like '!') in channels. Ability to limit number of users allowed in a connect class with the limit="" option. Support for Regex-based bans with /RLINE. New module, m_connectban, that will zline a user for connect and quit flooding after a certain amount of connects/quits in a certain amount of time. Support for Executable includes to the configuration file which can be used to create remote includes. /invite timers. Ability to set invites that expire a la: /invite foo #bar 5m for a invite that would expire in 5 minutes. Ability to log server notices to channel (m_chanlog) Configurable prefixes for +qa (m_chanprotect). No longer are you required to use ~&, you can change +a's prefix to be ! or some other character if you'd like. A new modulemanager was added for a Package Manager-like system for 3rd-party modules. Support for CIDR range detection of flooding and throttling, meaning distributed attacks are less effective User modes and Channel modes can also now be disabled in the <disabled> block in the configuration file Lower memory and CPU usage than any previous InspIRCd release. Many, many more! The list of people who have helped out from 1.1 to 1.2 is huge, but in particular, I would like to thank MacGyver, Namegduf, Taros, danieldg, Brain, peavey, Om, psychon, Special, aquanight, satmd, Majic, jdhore, Darom, Jason, Sm0ke0ut, PinkFreud and Syloq. Special mentions also go to Adam, chaz, Amanda, Brik, Kat, and anyone else who has helped us through the past few years. Some of you probably hate us now, but thanks anyway ;p. Additional thanks go to all of *you*, the people who use our code. We value your input, and we love you all! (If you feel forgotten, please, don't! I have a really bad memory. Just let me know) As always, a changelog and diffstat will be included for the curious.