Taps Mic! RentGaff.com is online. Find a place or find People to team up, based on your lifestyle, interests, and budget. List a spare room you have, and use filters to connect with the kind of person you want there. Current Irish sites like Daft needs a competitor.
Property Price Register, tracking 130K+ properties with a valid Eircode which have been sold in Ireland in the last few years. Also, you can view all Properties/Reviews/Court Cases across Ireland here.