Ancestry: https://www.ancestry.ca or https://www.ancestry.com

Association of Professional Genealogists: https://www.apgen.org

Board for Certification of Genealogists: https://bcgcertification.org

Family Search: https://www.familysearch.org/en/home/

ICAPGen: https://www.icapgen.org

Library and Archives Canada: http://www.bac-lac.gc.ca/ENG/Pages/home.aspx

Library of Congress: https://www.loc.gov

National Genealogical Society: https://www.ngsgenealogy.org

New England Historic Genealogical Society: https://library.nehgs.org

The Ontario Genealogical Society: https://ogs.on.ca