www.cyndislist.com
They don't come better than Cyndi Howells' site. More than 50,000 categorized genealogy sites.
www.genealogy.com/links/
This site started out as Helm's Genealogy Toolbox in 1995 and is part of a partnership with Genealogy.com. As of fall 1999, there were nearly 72,000 links. It's a good site, but it feels more corporate than Cyndi's List, and many of the links aren't specific to genealogy (for example, PBS stations in each state).
www-personal.umich.edu/~cgaunt/gen_int1.html
John Fuller and Chris Gaunt provide the requisite volume of Web links, but go beyond many of the other portal sites with locals of Gopher, File Transfer Protocol (FTP), Usenet newsgroup and Telnet connections.
www.census-online.com
One-stop shopping for places to find a wide variety of census data online.
www.genealogylinks.net
The 4,300 links here are primarily for ships' passenger lists, but there also are some nice links to church and cemetery records for the US, Canada, UK and elsewhere.
www.genealogypages.com
A bit more manageable than some of the larger portals, broken into 14 areas from adoption to software.
www.genhomepage.com
This portal is updated relatively regularly and contains some good links to general research and to individual histories.