Government
Irish Government
Department of Tourism, Culture and Sport

Universities, Libraries and Archives
Trinity College, Dublin
National Library of Ireland
National Archives of Ireland
Public Record Office of Northern Ireland
Public Record Office/National Archives, Kew, London
University College Dublin Archives
British Library
Marsh's Library, Dublin
Armagh Public Library

Digitisation
Digital Humanities Observatory
DARIAH
Arts and Humanities Data Service
MinervaEC - Guidelines for digitisation and best practice
Digital Preservation Europe
Irish Virtual Research Library and Archive
UK National Archives
Ireland Collection - JSTOR
Europeana - the European cultural heritage portal
i2010 digital libraries
Department of Tourism, Culture and Sport Policy - Business Plan 2010

Genealogical resources
Irish Origins
Ulster Historical Foundation
National Archives of Ireland genealogical services
National Archives of Ireland - 1911 Census
National Library of Ireland - family history advice