• SGREP: sublinear regular expression searching
• C source to an implementation of 'factor'
• Newsarc: If you save a bunch of articles from trn into a file, you end up with a bunch of articles delimited by things like "Article 30 of 500". I wrote a program which splits such archives into a collection of pages, one per article, plus an index file to index it. It will get spoofed by bogus instances of "Article 30 of 500" within article text, though. (A smarter program would probably check to make sure a few more header lines are present). You might also want to modify the source to trim out other headers that I'm not trimming out. It's in C because I don't know Perl particularly well; no doubt it would be 1/4 the lines in Perl.
• Some friends and I were writing a new and very sophisticated mud back in '93 or '94. Here's some sample code for the NPCs in it; these "AI"s are much better at reacting to events around them because they get easy-to-parse descriptions of the events, insteasd of just strings. Harry. Petbrain.

sean at nothings dot org