This program can be used as an IRC server which forwards everything you say to people on other chat networks: Jabber (which includes Google Talk), and Twitter.

This package contains a version of BitlBee that uses the libpurple instant messaging library instead of built-in code, which adds support for more IM protocols (all protocols supported by Pidgin/Finch) and features (like file transfers), at the price of being less lightweight.

If you don't need the extra features, it's better to use the built-in code.