The List is a colour-coded resource for finding out what survives of the registers and records of individual Church of Ireland parishes, and, if they survive (in either original or transcribed format), where they are held. It additionally provides links to online records and to other details of the parishes. It is an essential finding aid for Irish genealogists.
It's free to download here.
Those guys and gals at the RCB Library are the loveliest people!