Cindi's list is one of the better known genealogy 'link' sites on the internet. It can be overwelming to the the beginner and the advanced internet user as well, and can be slow to navigate. None the less, it is a great site and worth the effort.
GENDEX provides access to a huge GEDCOM library and links to many of researchers.
Genealogy Online, with its GenSite genealogy site list of links, is one of the sites I frequently visit.
RootsWeb is a great resource for genealogists of all levels. RootsWeb started from the Roots-L mailing list and Roots Surname List archives and has grown into one of the larger genealogy sites on the internet. Membership in the co-op is encouraged if you wish to take full advantage of their site.
Do you think you are related to someone Royal or Noble? Well, this is the site to find out. He has tons of information on European nobility as well as some on US famous people as well.
SurnameWeb provides a registration point for surname home pages. It also provides hints on home page building.