Ircd-ratbox is an advanced, stable and fast ircd. Ircd-ratbox 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.

Ratbox-respond is a tool that provides a client side implementation of the challenge opering system in ircd-ratbox. The challenge system provides the ability to oper using private key authentication instead of passwords to improve security. Ratbox-winrespond is a windows version of the tool.

Ratbox-services is a services package written mostly from scratch for use with ircd-ratbox. It is highly configurable, with nearly all options being set in a config that can be rehashed rather than set at compile time. It also uses the SQLite. Database backend, which works as a database interface to a normal file, meaning no seperate database software must be running. Allows users to register usernames, which then form the basis of all access to channels.