Thanks to Christina Hunt for sharing the following information:

"Prior to 2007, IGP was a website with space on the old Rootsweb site, a simple Ireland Genealogy site divided into counties. The original Admin, Don Kelly, suggested adding an archives section for Data. Thus the Ireland Genealogy Projects Archives (IGPA) was born.

We want the IGPA to be a place where people, whether their families remained in Ireland or emigrated, can share publicly what they have with other family historians. There are the usual categories that you would expect—birth, marriage and death records, cemeteries and newspapers—but we also have subjects that feature more heavily in Irish research such as Census Substitutes and Constabulary records. All our records are submitted by family historians from around the globe. We like to think that we are not just sharing, but helping to preserve information collected by avid Irish genealogists. Spreadsheets have always served as a useful tool for pulling data out of a document such as a set of baptisms or marriages. County Fermanagh has a particularly large set of Church Records transcribed this way and shared with the IGP Archives.

Headstones are the fastest growing category in IGPA and can be a treasure trove in Ireland, often providing names of parents and/or siblings. Maiden names are often included. We currently have over 182,000 images of headstones. I like to remind people that each headstone can contain a number of names, so the number of people represented is far more than 182,000.  Considering the lack of records in other areas, they can be a little genealogy set in stone.

Returning from holidays or genealogy trips to Ireland, family historians started sending 10 or 20 photos of gravestones they had taken while conducting their research. These formed the basis for tracking those cemeteries.

The database of images started to grow, albeit slowly at first. Then a couple of lovely ladies who live in Ireland, Joyce Tunstead and Yvonne Russell, came forward and began taking photos in Dublin and Wicklow. They have added thousands of pictures. As a bonus, they have even transcribed the headstones. Joyce was fundamental in advising on the style we use in our transcriptions, which is very traditional. We use a pipe symbol at the end of each line and capitalize the names.

Currently we are often sent whole cemeteries by volunteers. Even people who are not very tech savvy can successfully share photos. We use Dropbox or pCloud Transfer to share large images.

According to John Grenham, we are the second largest collection of Headstones online, after Find a Grave. We are very proud of the progress made in the last 18 years."

More details about the Ireland Genealogy Projects—the County Pages (Research Aids) and the Archives Pages (Data and Headstones)—can be found here.