Northern Ireland

Session Book of Aghadowey, 1702-1725 $ papers covering financial, legal and disciplinary matters from Aghadowey, County Londonderry starting in 1702, where some of the first mass group of of Irish and Scots Irish people immigrants to America came from
Emerald Ancestors $ Specializing in Irish ancestry within Northern Ireland, subscription required, starting at monthly rates
The General Register Office (GRO) for Northern Ireland birth > 100 years, marriage >75 years and death >50 years old online, searches free, $ to download
Historic Belfast City Directories from the Public Record Office of Northern Ireland (PRONI), a collection of city directories, primarily for the Belfast region, from 1819 to 1900, searchable by keyword (including name), specific city directory and year
Irish Family History Foundation parish and statutory records transcriptions for County Londonderry
Placenames of Northern Ireland NEW  includes historical administrative names for 6 counties, 60-plus barony and district names, 269 civil parishes, 9,600 townlands and at least 20,000 non-administrative names (including the names of rivers, lakes, mountains, and other physical features)
PRONI (Public Record Office of Northern Ireland) NEW Online information about a variety of research topics. Databases include Ulster Covenant, Freeholders records, and a fully searchable index to the Will calendar entries for the three District Probate Registries of Armagh, Belfast and Londonderry, for the period 1858-1919 and 1922-1943.
Valuation Revision Book Search list of landholders and their property valuations in counties Antrim, Armagh, Down, Fermanagh, Londonderry and Tyrone, filling in gaps between Griffiths Valuation which ends in 1864 and the 1901 census