WSN Knowledge Base makes it easy to create a web directory and provides the tools to improve your search engine rank. Link trading can be encouraged and enforced with the reciprocation options and the link checkers which verify. Custom information can be stored in custom fields. Any number of files can be attached to a link, and thumbnail previews are available for images. All output is editable via the templates and language systems, and it's easy to translate to a new language. You can integrate with almost any MySQL-based member system or use the built-in one. Includes pagerank, website thumbnails, ratings, visitor reviews, emailing of links, the ability for members to save links, XML-based bulk submissions, and so on. The caching system helps you keep the load down on high traffic sites. The switches page makes it easy to turn off the options you don't need, so that you don't get overwhealmed.