http://www.macnn.com/articles/02/04/16/charla.1.6:/
Charla 1.6: open-source Yahoo! IM client
updated 12:40 pm EDT, Tue April 16, 2002
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Peter Ammon's Charla 1.6 is an open-source Yahoo! chat client for OS X. It includes support for filter plug-ins, a regular expression filter, and saving and searching through the chat text. Source code and binaries are both available.
