fifoirc creates a named pipe on the local filesystem, such that any data written to the pipe will be written to an IRC channel. It is also possible to connect a filter program to the channel, such that any text written in the channel is passed to the program, and any text output by the program is passed to the channel.
Auto IRC Bot is an advanced, lightweight, modular, and easy-to-use IRC bot. It is easy to install and configure, and comes packaged with various modules. You can use its advanced, straightforward, and flexible API to make your own modules. Auto is IRCv3 compliant. It supports CertFP, SASL, IPv6, and SSL. It supports multiple networks and channels, and it uses a privilege system for permissions.
Bitrats adds D-RATS support to Bitlbee. Messaging is fully supported, but file transfer is not. Bitlbee is a program which connects to instant messaging servers like Jabber (Google Talk) and MSN Messenger but is controlled via any IRC client. D-RATS is software that provides chat and file transfer support on D-STAR radios. D-STAR is a digital communications protocol for radio amateurs. It supports digital voice and slow (1200bps) data transfer in 2m and 70cm amateur bands and faster Ethernet-protocol-based communications in higher frequencies.
Bip is an IRC proxy that supports replaying logged conversation and multiple clients on one IRC server connection. It has a handy logging directory structure. It is multi-user and has a flexible configuration. Some of its configuration can be changed at runtime with special IRC commands.