While this may be old news for experienced researchers of Irish family history, the topic bears review. 

Most genealogists are likely to agree about the “big three” free websites for Irish research and the resources most frequently searched:

1) Irish Genealogy  (Irishgenealogy.ie) – Civil birth/marriage/death records and some pre-20th century church records, now searchable with a single query

2) National Archives of Ireland (nationalarchives.ie) – Irish Censuses for 1901 and 1911, plus fragments and substitutes for 1821-1851

[Note the new URL for census research: nationalarchives.ie/collections/search-the-census/]

3) National Library of Ireland (nli.ie) – Microfilmed images of Roman Catholic Parish records. Indexes can be found at Findmypast (free) and Ancestry.

John Grenham's website, one of my personal favorites, will be described later in a separate posting.