RootsWeb - the Internet's oldest and largest free genealogical community.  An award winning genealogical resource with searchable databases, free web space, mailing lists, message boards and more.

Ancestry.com DNA testing

GenForum - Over 14,000 online forums devoted to genealogy, including surnames, US states, countries and general topics.

Social Security Death Index

Find A Grave - a resource for finding the final resting places of famous folks, friends and family members.  With millions of names, it's an invaluable tool for genealogists and family history buffs.

USGenWeb - Free genealogy and family history online made possible by the USGenWeb Project volunteers. Search no cost genealogy websites for your ancestors.

USGS GNIS - Database query form for the United States Geological Survey's  Geographic Names Information System. 

FamilyTree DNA - Establishing DNA fingerprints for the purpose of determining ancestral pedigrees.

Linkpendium - The definitive directory of genealogy and family history sites.  Linkpendium's goal is to index every genealogy related site on the net.

Genealogy Pro - the most comprehensive page on the Internet for finding professional genealogists, adoption and missing people researchers, translators, military and historical researchers, heraldry specialists, heir and estate researchers, photographers, and genealogy related services!

Family Search - The largest collection of no cost family history, family tree and genealogy records in the world.

Cyndi's List - A large categorized and cross-referenced directory of sites useful for genealogical research, with hundreds of thousands of hyperlinks.

My Cinnamon Toast Surname Search - Genealogy explorer to browse by surname or by region.