Almost all of these sites are free, except as noted below, an often overlooked tactic is to Google the place for which you want to find records or information. Example; Place name, Anytown, Ontario, Canada, historical records, results often include information for local historical societies or groups who have records or are willing to provide advice or information.
Great Britain
Find my Past U.K. Pay site
https://www.nationalarchives.gov.uk/
https://www.freebmd.org.uk/ Birth, marriage, death and burial records, census, for most of Great Britain
https://www.britishnewspaperarchive.co.uk/
Many counties have Online Parish Clerks, such as http://www.kent-opc.org/index.html
This site has links to most of the OPC websites, https://www.ukbmd.org.uk/online_parish_clerk
https://www.genuki.org.uk/ Genuki is a virtual reference library of genealogical information, I find it very helpful as a resource for other places to look.
Scotland
https://www.scotlandspeople.gov.uk/ Pay site
Kent, Surrey and Sussex
https://www.theweald.org/home.asp
Staffordshire
http://www.archives.staffordshire.gov.uk/CalmView/default.aspx
Shropshire
https://www.shropshirearchives.org.uk/
Ireland
https://www.nifhs.org/
https://www.johngrenham.com/
Canada
https://www.bac-lac.gc.ca/eng/Pages/home.aspx Library and Archives Canada (LAC), Free has censuses, from the early 1800s to the 20th century, military records, land records, immigration, government records.
https://www.bac-lac.gc.ca/eng/discover/genealogy/Pages/introduction.aspx
https://heritage.canadiana.ca/ The Héritage project is a 10-year initiative to digitize and make accessible online some of Canada’s most popular archival collections encompassing roughly 40 million pages of primary-source documents. Chronicling the country and its people from the 1600s to the mid-1900s, this collection represents a vast and unique resource for Canadian historians, students, and genealogists.
Our Roots / Nos Racines; collections of digitized Canadian local history publications, in English and French. Search or browse by author, title or subject. Hosted by various Canadian universities, you may need to search with a location. https://library.upei.ca/our_roots , https://digitalcollections.ucalgary.ca/
https://cemetery.canadagenweb.org/
https://canadianheadstones.ca/wp/
http://uelac.org/ United Empire Loyalists
http://sites.rootsweb.com/~obituary/index.html obituary daily Times
http://automatedgenealogy.com/ Censuses
Ontario
http://www.archives.gov.on.ca/en/tracing/the_records.aspx
https://news.ourontario.ca/about.asp?ID=3 ontario community newspaper portal, has 200 years of Ontario newspapers, online
https://help.onland.ca/en/historical-books/ Land records
http://bowergenealogy.ca/resources/methodist/index.html Wesleyan Methodist Baptismal Registers, 1825-1910
Historical maps with settlers' names, https://maps.library.utoronto.ca/hgis/countymaps/aboutus.html
Canadian county atlas digital project, https://digital.library.mcgill.ca/countyatlas/searchmapframes.php
Specific places
http://geneology.dufferinmuseum.com/Research/DufferinGeneology/StartSearching.aspx Ontario counties, Peel, Wellington and Dufferin; Births, marriages, engagements, deaths, burials, other social announcements from many local newspapers.
https://hwtproject.ca/ Historic Westmeath Project; This website is a marvellous example of a One Place Study with contributions from descendants of the early settlers in this area, plus maps, photos and many historical facts. The township is located in the Upper Ottawa River Valley in Eastern Ontario, Canada, approximately 90 minutes west of Ottawa.
This site is being updated November 2021, it is online, with all information except family histories which will be back by the end of the year.
http://www.ourstoriesinnisfil.ca/ Innisfil Ontario