The following is a list which might be of use to the genealogist researching in Cork and Ireland in general in many cases.
Familysearch.org which has the Irish Civil Records index from 1864 to 1958 (also Church of Ireland Marriage index from 1845 onwards).
Tithe Applotments (circa 1830): Tithe Applotments
Griffith’s Valuation (circa 1852): www.askaboutireland.ie/griffith-valuation/index.xml and www.failteromhat.com
The Irish 1901 Census: 1901 Census
The Irish 1911 Census: 1911 Census
Religious Census 1766 (not available for everywhere)
Books of Survey and Distribution (approx 1664)
Pendars Survey 1659
Street Directories: Street Directories for Cork
Registry of Deeds (from 1708): Registry of Deeds
For high profile names, Burke’s Landed Gentry (various publications) and Burke’s Peerage (various) might be useful.
O’Harte’s Pedigrees has many surname lists of genealogical usefulness.