Here's some links to sites of interest

Reformed Presbyterian Church in Ireland

Other Reformed Presbyterian Churches
New Life Fellowship, Letterkenny
Faughan (Derry)
Limavady
Ballyclabber (Coleraine)
Newtownards
Dromore (Co Down)
Airdrie (Glasgow)
Cloughmills (Co Antrim)
Lisburn
Carrickfergus

Sermons Online - other than on the above websites
Edward Donnelly (Trinity RPC)

Useful Christian Sites
4you.ie (Stories of Irish Christians and how they came to find Jesus)
Discerning Reader (Book Reviews)
Bible Gateway
Answers in Genesis
Monergism.com (Articles and resources on the Christian faith)
Christian Spotlight on the Movies (Film reviews from a Christian perspective)