Irish Statute Book
It contains all the Acts of the Oireachtas and Statutory Instruments from 1922. Also the chronological tables of the Statutes shows how Acts have been subsequently affected (Legislation Directory).
Houses of the Oireachtas
This contains the Acts of the Oireachtas, Bills and explanatory memoranda to Bills in pdf since 1997. It also has a link to the Irish Statute Book (above). It also includes all Dáil and Seanad parliamentary debates from 1919 to date and also Select Committee debates from 1999 to date.
Attorney General’s Office
This website contains useful restatements of the law which are combined versions of various related acts and their amendments. There are restatements of the Sale of Goods Acts, Defence Acts, Tourist Traffic Acts and the Succession Act.