Plugshare is probably your best bet for viewing all charge stations in Ireland. And can be filtered by "requires fee". It's community/publicly updated, so never 100% correct.
For starting a charge session, your best off using the app native to the charge point. Easygo let's you charge on multiple different operators units, but it's more expensive than going direct
Yeah I'd get the ESB Ecars and EasyGo apps as they're the most common for now
Some cars are now coming with charging cards to activate various networks. VW for example have a We Charge card which can start ESB chargers and others
This is often at a higher price than the native app though
Circle K and Applegreen are also installing their own chargers. Hopefully they put debit card readers on them, otherwise that'll be another app or two to install
There's a few free chargers around, often provided by a business for customers. Lidl had free EasyGo chargers, but they're introducing charges next week
Although free electricity is nice, it's also a bit of a pain since it encourages people to camp at the chargers
In NI where ESB chargers are still free, there are cars that will plug into a DC chargers for an entire day, whereas down here the overstay fee kicks in after 45 mins