Librarian's Internet Index (www.lii.org) has 20,000 pages, 14 main topics, and nearly 300 related topics. Compiled by public librarians. A high quality sites only. Great reliable annotation.
Infomine (infomine.ucr.edu) has over 125,000 pages Great reliable annotation. Compiled by academic librarians from the University of California at Riverside and elsewhere. A high quality site.
About.com (www.about.com) has over 2 million generally reliable annotation. Compiled by guides with various levels of expertise.
Google Directory, (directory.google.com) About 5 million selected by the Open Directory Project, and enhanced by Google searching and ranking. Often used to find better results, especially on broad or widely covered topics.
Mahalo.com (www.mahalo.com) is a human-powered search engine that creates organized, comprehensive, and spam free search results for the most popular search terms. Mahalo will find and organize the best links for search terms, so you don't have to. Using Mahalo.com you can say goodbye to mediocre content, and deceptive sites.