RuterSearch was a project I started in 1999 after being disappointed with a search Perl script I purchased. I bought Perl for Dummies and began to learn Perl myself to implement my own search script. It was a great learning experience, and a pretty nice lightweight search script was the result; I sold it on Qwerks for awhile at $25 per license. Eventually, I discontinued development on RuterSearch; however, the original source code and documentation are still available here for historical purposes. I have released the code under the GPL license (if stated differently anywhere else, please disregard), but I would really hope that no one would use this now!
You can see the original page where I hosted this project on the Wayback Machine: http://web.archive.org/web/20021002111914/http://www.ruter.net/soft/rutersearch/
The old project documentation is also available.