Infoseek Fairly fresh and complete catalog. Can limit text searches to predefined field, such as the title of a document or within links. Image-search function that displays thumbnails, not just hyperlinks. WebCrawler Catalog is one of the smallest as they concentrate on key sites and fresh listings. One of the more user-friendly engines.
Help is abundant with plenty of Boolean examples.
LookSmart Reader's Digest search engine. Sites must be approved by editors for appropriate content before being placed in their catalog.