Note to self: The gnu talkfilters package at http://www.dystance.net/software/talkfilters/ contains a bunch more filters, as well as probably some updated versions. I should see about integrating this into filters. As a first step, I have mailed its maintainer. If nothing comes of that, I may want to add selected ones into the filters package. I am slightly unsure of some of the copyrights of various of the talkfilters. They seem to have just taken them and slapped the GPL on them if they could not contact the author: While all of these filters have been available in one form or another in the public domain for many years, the original authors of some of the filters are unknown. Reasonable attempts were made to find the authors and obtain written permission to repackage the filters as GNU software, but in some cases they could not be located.