Johngrenham.com – much info free, some for an online fee. His free monthly blog is both informative and hilarious.
Familysearch.org Ireland Valuation Office 1831-1856 – in Records (not Catalog) is not only searchable but browseable, unlike valuation books in Nationalarchives.ie which is searchable by name (http://census.nationalarchives.ie/search/vob/home.jsp) but only allows a view of that one page at a time. Also,see Familysearch.org. Ireland.Tithe Applotment, 1814-1855 vs. same in National Archives (http://titheapplotmentbooks.nationalarchives.ie/search/tab/home.jsp) Check Familysearch.org, under Catalog tab for U.S. vital records by place, digitized from their microfilm of the same. Not all town and city vitals have been digitized, nor have all individual films of those places, but for those that have, it is just like turning the original pages.
Irishgenealogy.ie has free RC records from only Kerry, parts of Cork and Dublin, but it does have civil records from 1864 from all Ireland. The latter is not at all complete (as noted) and the search engine is a bit inflexible.
Familysearch.org and Ancestry.com have some searchable civil records but coverage varies so it can be hard to know whether a record exists or is just not yet online.
Rootsireland.ie (subscription site) also has civil records (as well as indexed RC - including some areas not included on the National Library site), all searchable by name and by locality, civil records not complete. Monthly fees are very reasonable and they do not automatically continue your subscription.
Findmypast.com (subscription site) has a large Irish records component, indexing RC records from the NLI. One can register for free and use the index. With likely names and dates, one can then visit the free NLI.
Registers.nli.ie - National Library of Ireland (registers.nli.ie) has free scans of RC parish records. The format is useful, with outline maps and names of parishes. Date ranges of available records are stated. One can scroll through all images, which are digitally numbered for reference. Keep in mind that some parishes or year ranges (especially after 1880) are not at the NLI, but may be found at Rootsireland.ie (above). On Johngrenham.com, one can go to the following link - (https://www.johngrenham.com/browse/retrieve_text.php?text_contentid=25#locations) - then pick a county, then RC records, which will give a list of which parish records are available and their online sources.
Logainm.ie - Free Irish place name site, useful for obscure local places. Information has been researched. It still may not include former or obsolete places cited in some baptismal records.
Ctstatelibrary.org - Connecticut State Library – look under their Collections tab, then Databases - now has online CT death and CT marriage indexes (1897-1968), searchable by name, date and place. Data is minimal but it can be useful where the information sought is later than Familysearch.org Catalog's microfilmed/scanned records cutoff dates.
Chroniclingamerica.loc.gov There are also a few free online CT newspapers (https://ctdigitalnewspaperproject.org/)
Yourlawyer.com/library/new-york-city-history-ellis-island - This free site includes information on the small island in New York Harbor that served as an immigration station from 1892 to 1954. Site information includes the History and Significance of Ellis Island; Genealogy and Ellis Island; and Studying Genealogy Through Ellis Island Records, which includes an extensive list of search topics.
The Irish experience has had a profound impact on Connecticut's past, and its narrative spans all periods of the state's history and touches every one of its eight counties and 169 towns.