advanced, stable and fast ircd

 ircd-ratbox is a full featured ircd. It is the primary ircd used on EFNet,
 combining the stability of an ircd required for a large production network
 together with a rich set of features making it suitable for use on smaller
 networks.
 .
 ircd-ratbox also has a twin services package with compatibility code in
 ircd-ratbox allowing for enhanced features and better support for networks
 with channel registration.