SiteSeeker is a commercial search engine for web sites. It has built in human language technology, such as stemming for Swedish and English. SiteSeeker has also built-in dynamic spell support where the index is the lexicon. SiteSeeker has also a language filters/recognizers for 40 European languages. SiteSeeker has automatic extraction of the context of the entered search words. The ranking mechanism is based on the term relevance model with link validation. The proximity of the search words in the document is also included in the model. SiteSeeker can index text, html and pdf-files. Try also www.nada.kth.se to search.