General Heritage Resources
An Taisce - www.antaisce.org
Archaeological Survey of Ireland - www.archaeology.ie
Coillte - www.coillte.ie
Dept. of Culture, Heritage and the Gaeltacht - www.chg.gov.ie/heritage
Dept. of Housing, Community and Local Government - www.housing.gov.ie
Environmental Protection Agency - www.epa.ie
Heritage Maps - www.heritagemaps.ie
Inland Fisheries Ireland - www.fisheriesireland.ie
National Environmental and Sustainable Development Information Service - www.enfo.ie
National Inventory of Architectural Heritage - www.buildingsofireland.ie
National Library - www.nli.ie
National Monuments Service - www.archaeology.ie
National Museum - www.museum.ie
National Parks and Wildlife Service - www.npws.ie
Office of Public Works - www.opw.ie
Ordnance Survery of Ireland - www.osi.ie
The Heritage Council - www.heritagecouncil.ie
Teagasc - www.teagasc.ie
Transport Infrastructure Ireland (Previously NRA) (for environmental works) - www.tii.ie
Waterways Ireland - www.waterwaysireland.org
Leitrim Heritage Centres and Attractions
FenaghVisitors Centre - www.fenagh.com
Glenfarne - Ballroom of Romance - www.facebook.com/therainbowballroomofromance
Kiltyclogher Heritage Centre - www.kiltyclogherheritagecentre.com
Leitrim Genealogy Centre - www.leitrimroots.com
Leitrim Library - Local Studies
Manorhamilton Castle - www.manorhamiltoncastle.ie
Margeret of New Orleans - Birthplace - www.margaretsbirthplace.com
Sean MacDiarmada's Homestead - www.seanmacdiarmada.ie
St. George's Visitor & Heritage Centre - www.carrickheritage.com
Archaeology and Built Heritage
An Taisce - www.antaisce.org
Archaeological Survey of Ireland - www.archaeology.ie
Association for Industrial Archaeology - industrial-archaeology.org
Commissioner of Irish Lights - www.cil.ie
Database of Irish Excavation Reports - www.excavations.ie
Department of Culture, Heritage and the Gaeltacht - national policy on built heritage and architecture - www.chg.gov.ie
Discovery Programme - www.discoveryprogramme.ie
Dry Stone Wall Association of Ireland - www.dswai.ie
Engineers Ireland Heritage Society - www.engineersireland.ie
Group for the Study of Irish Settlements - irishsettlement.ie
Historic Graves - historicgraves.com
Industrial Heritage Association of Ireland - www.ihai.ie
Institute of Archaeologists of Ireland - www.iai.ie
Irish Architectural Archive - www.iarc.ie
Irish Georgian Society - www.igs.ie
Irish Post-Medieval Archaeology Group - www.ipmag.ie
Irish Railway Record Society - www.irrs.ie
Irish Workhouses - www.workhouses.org.uk
National Inventory of Archiectural Heritage - www.buildingsofireland.ie
Office of Public Works - www.heritageireland.ie
Railway Preservation Society of Ireland - www.steamtrainsireland.com
Royal Institute of Architects of Ireland - www.riai.ie
Transport Infrastructure Ireland (Previously the NRA) - archaeology - www.tii.ie
Cultural Heritage
Cultural Heritage Ireland - www.culturalheritageireland.ie
Genealogy Advisory Service - National Library of Ireland - www.genealogy.nationalarchives.ie
Historical Mapping - Ordnance Survey of Ireland - www.osi.ie
Industrial Heritage Association of Ireland - www.ihai.ie
Institute of Conservator-Restorers in Ireland - www.conservationireland.org
Irish Archives Resource - www.iar.ie
Irish Society of Archives - www.irishsocietyforarchives.com
Military Archives, Dept. of Defense - www.militaryarchives.ie
National Archives of Ireland - www.nationalarchives.ie
National Folklore Collection - www.ucd.ie/folklore & www.duchas.ie
National Folklore - www.duchas.ie
National Library - www.nli.ie
National Museum - www.museum.ie
National Television and Radio Archives - www.rte.ie
Oral History Network of Ireland - www.oralhistorynetworkireland.ie
Placenames Database - www.logainm.ie
Royal Irish Acadamy - Book of Fenagh - www.ria.ie
Natural Heritage
All Ireland Invasive Species Awareness - www.invasivespecies.ie
Biodiversity Watch Project - www.biology.ie
Birdwatch Ireland - www.birdwatchireland.ie
Crann - Trees for Ireland - www.crann.ie
Geological Survey of Ireland - www.gsi.ie
Green Schools Ireland - greenschoolsireland.org
Hedge Laying Association of Ireland - www.hedgelaying.ie
Irish Peatland Conservation Council - www.ipcc.ie
Irish Seedsavers - www.irishseedsavers.ie
Irish Whale and Dolphin Trust - www.iwdg.ie
Irish Wildlife Trust - www.iwt.ie
Irish Uplands Forum - irishuplandsforum.org
National Biodiversity Data Centre - www.biodiversityireland.ie
National Environmental and Sustainable Information Service (ENFO) - www.enfo.ie
National Parks and Wildlife Service Manuals - www.npws.ie
Native Woodland Trust - www.nativewoodlandtrust.ie
Notice Nature - www.noticenature.ie
Sligo Leitrim Beekeepers Association - www.sligo-leitrimbeekeepers.com
The Heritage Council - www.heritagecouncil.ie
The Irish Landscape Institute - www.irishlandscapeinstitute.com
The Marine Institute - www.marine.ie
Transport Infrastructure Ireland - www.tii.ie
Tree Council - www.treecouncil.ie
Woodlands of Ireland - www.woodlandsofireland.com