The USGenWeb project links to genealogical pages for all 50 states:
http://www.usgenweb.com
The Kansas GenWeb site has links for every county in Kansas:
http://skyways.lib.ks.us/genweb/index.html

The National Archives main genealogy page:
http://www.archives.gov/research_room/genealogy/index.html

Some of the links on these sites are free and some are for subscription databases:
Cyndislist has thousands of links, including many for genealogy outside the United States:
http://www.cyndislist.com
AccessGenealogy http://www.accessgenealogy.com/
Ancestry http://www.ancestry.com/mainv.htm
Rootsweb http://www.rootsweb.com/
Family Treemaker http://familytreemaker.genealogy.com/?Welcome=1041811000

Latter-day Saints Family History Centers can borrow records on microfilm from Salt Lake City and have other research materials, including an online ancestor file. Use this site to locate the Center nearest you and learn about the services they provide:
http://www.familysearch.org

The Steve Morse site includes many genealogy search tools, including a Soundex code generating program and a searchable database of enumeration districts for large towns for the 1930 census:
http://www.stevemorse.org/

Vital Records

Social Security Death Index
http://ssdi.genealogy.rootsweb.com/cgi-bin/ssdi.cgi

Interment lists for cemeteries all over the country, including U.S. military cemeteries:
http://www.interment.net

The National Center for Health Statistics has links for all fifty states:
http://www.cdc.gov/nchs/howto/w2w/w2welcom.htm

Kansas Office of Vital Statistics:
http://www.kdhe.state.ks.us/vital/
Missouri Bureau of Vital Records:
http://www.dhss.mo.gov/BirthAndDeathRecords/index.html
Missouri Death Certificates Index, 1910-1955:
http://www.sos.mo.gov/archives/resources/deathcertificates/

Immigration Records

You can search this site for Ellis Island passenger lists:
http://www.ellisisland.org

Immigration records available at the National Archives and how to order copies:
http://www.archives.gov/genealogy/immigration/

Military Records

The National Park Service's Civil War Soldiers and Sailors System is creating searchable databases of both Confederate and Union soldiers who served in the Civil War:
http://www.itd.nps.gov/cwss/

For information on military records at the National Archives and how to order them:
http://www.archives.gov/genealogy/military/

These contain the official reports of Civil War military operations:
Official Records of the War of the Rebellion
http://cdl.library.cornell.edu/moa/browse.monographs/waro.html
Official records of the Union and Confederate Navies in the War of the Rebellion
http://cdl.library.cornell.edu/moa/browse.monographs/ofre.html

Kansas in the Civil War page:
http://skyways.lib.ks.us/genweb/civilwar/index.html

Native American Genealogy

This site has links to tribal censuses and Bureau of Indian Affairs records online:
http://www.accessgenealogy.com/native/

Native American records at the National Archives:
http://www.archives.gov/genealogy/heritage/native-american/

Kansas Native American genealogy page:
http://skyways.lib.ks.us/genweb/nativeam/

Places

The USGS Geographic Names search site can be used to locate dead towns as well as existing ones, cemeteries, schools and geographic features. The search engine provides links to maps and aerial photographs of the location as well:
http://geonames.usgs.gov/pls/gnispublic

The Bureau of Land Management's General Land Office records database:
http://www.glorecords.blm.gov/

Wichita State University digitized Kansas maps collection:
http://specialcollections.wichita.edu/collections/maps/index.asp

Newspapers

These sites have links to U.S. and international newspapers online:
http://www.ipl.org/div/news/
http://www.onlinenewspapers.com/
http://www.newspapers.com/

The University of Kansas Law School Library maintains links to Kansas newspapers online:
http://www.law.ku.edu/library/researchlinks/index.shtml#news

Dr. Edward N. Tihen's index to articles in Wichita newspapers, 1872 to 1982:
http://specialcollections.wichita.edu/collections/local_history/tihen/index.asp

The Topeka and Shawnee County Public Library: http://www.tscpl.org
provides an online index to articles from Topeka newspapers for some years and also an obituary index 1906-ca. 1935 and January 2004 to the present:
Topeka newspaper index
Topeka obituary index

Small Town Papers has digitized versions of some historic Kansas papers: http://www239.smalltownpapers.com/smalltownpapers/jsp/user_current_archive_editions_title.jsp?state=Kansas

Photographs

Deadfred is a site where people can share their historic photographs and post photographs that they are trying to identify:
http://www.deadfred.com/

The George Eastman House, Rochester, N.Y., has a growing collection of historic photos online:
http://www.geh.org

History On the Internet

Making of America's online U.S. history documents from Cornell University:
http://cdl.library.cornell.edu/moa/
and from the University of Michigan:
http://www.hti.umich.edu/m/moagrp/

The Library of Congress' American Memory: Historical Collections from the National Digital Library:
http://memory.loc.gov/ammem/ammemhome.html

The Public Broadcasting System's history site:
http://www.pbs.org/history/

Kansas history online:
Books and historical markers:
http://skyways.lib.ks.us/history/
Book transcriptions:
http://skyways.lib.ks.us/genweb/kslinks/books.html
http://www.kancoll.org/index.html
Kansas Legislators Past and Present:
http://www.kslib.info/ref/legislators/index.html
One room schoolhouse project:
http://www.sckans.edu/~orsh/
Orphan Trains of Kansas:
http://www.kancoll.org/articles/orphans/index.html