The National Library of Ireland will make their entire collection of Catholic parish register microfilms freely available on-line by summer 2015.

The records are considered the single most important source of information on Irish family history prior to the 1901 Census.  Dating from the 1740s to the 1880s, they cover 1,091 parishes throughout Ireland, and consist primarily of baptismal and marriage records.

I will post more information as it becomes available.