The 2004 Book of Common Prayer from the Church of Ireland's website; in English and Irish Gaelic

The Church of Ireland website also has a number of additional worshiup resources.

The 1926 Book of Common Prayer

The 1926 Book of Common Prayer in Irish Gaelic

The 1878 Book of Common Prayer, adopted upon disestablishment, as PDF graphics from Google Books.
The Internet Archive has Notes ... Historical and Explanatory, by John Macbeth (4th Ed., 1906), concerning the 1878 BCP.    

(Proposed) Amendments to the Book of Common Prayer (1861): Proposals to move the Prayer Book in a decidedly Protestant direction. 

The 1666 Book of Common Prayer (The English 1662 BCP with variations)

Google Books has an 1849 edition of the original MS copy of this book, richly annotated by Archibald John Stephens, in three volumes: Vol. I, Vol. II, Vol. III (Griffiths 1849/24).
Also from Google Books are:
1700, Andrew Crook (Griffiths 1700/5),
The 1700 printing includes "A Form for Receiving Lapsed Protestants" and forms for the Dedication, Restoration and Expiation of churches, along with additional material generally absent in other printings.
1712, A. Rhames for E. Dobson (Griffiths 1712/8)
1739, George Grierson (Griffiths 1739/10),
1745, George Grierson
1752, George Grierson (Griffiths 1752/14) and
1785, George Grierson (Griffiths 1785/6), all published in Dublin.
 
The Internet Archive has:
1712, A. Rhames for E. Dobson (Griffiths 1712/8)
1716, A. Rhames et al. (Griffiths 1716/6).
1721, G. Grierson(Griffiths 1721/4).
1722, bible version, A. Rhames for J. Hyde et al. (Griffiths 1722/4).
1739, bible version, G. Grierson (Griffiths 1739/9).
1739, G. Grierson. 
1757, executor of GA Grierson (Griffiths 1757/9).
1765, B. Grierson, (Griffiths 1765/5)
1794, G. Grierson (Griffiths 1794/7)
1795, G. Grierson. (Griffiths 1795/8)
1800, G. Grierson (Griffiths 1800/7)
all published in Dublin.

("Griffiths" indicates references in David Grifftihs' Bibliography of the Book of Common Prayer.)

The 1666 Irish Book of Common Prayer in Irish Gaelic was printed in 1712, (Griffiths 64:3), also from the Internet Archive.

Links to several liturgies (A Service of the Word, Compline) may be found on Oremus