Cyndi's List- This mega-site lists a variety of genealogy websites, including alumni organizations, list of faculty and classmates, and a section on yearbooks and annuals.
Cyndi Lauper, one of the punk girl pioneers, did this to great effect.
Cyndi's List of Genealogy Sites on the Internet has an extensive list of online databases arranged by category, such as immigration, land and marriage records.
Cyndi's List of Genealogical Sites on the Internet is a website that lists the databases on the web by type and geographical location.
If you are looking for a specific type of website, check Cyndi's List.