TSEP – The Search Engine Project
http://www.tsep.info/

TSEP is a simple, yet very powerful and fast PHP website search engine. It is built to index your site so it can be searched later within seconds. Features include: a)your own stopwords, b) logging, c) MySQL Boolean search, d) many languages, and e) CSS formating. This has been added to Bot Research Subject Tracer™ Information Blog.