Freespace page Irish Gravestones lists and links to sites and publications containing Irish tombstone inscriptions (often with photgraphs), cemetery registers and graveyard surveys.
Tombstone inscriptions and cemetery registers often contain much more information than the more usual parish burial records, including details of family members buried together, dates, occupations, the names of those organising the burial and so on. A lot of data is available, although it is unfortunately scattered in many different places, many of which are mentioned here.
This page is part of a series Early Modern Irish Sources, because of the value of this information in the genealogy of 17th and 18th century Ireland, although very large numbers of the graves and burials described are much more recent, indeed up to the 21st century.
I would be very grateful for suggestions on extra sources to add to the page or other ways to improve it.