Useful liturgical sites
The Church in Wales site has currently a small amount of liturgical material on it
www.churchinwales.org.uk/resources/liturgy in .pdf format (you can print them but not edit them) include Holy Matrimony and the Funeral Service, along with Calendar and Lectionary.
The full range of Church of England material is freely available from www.cofe.anglican.org/worship/liturgy/commonworship/texts/index.html
www.oremus.org contains a wealth of material from different provinces of the Anglican Communion, as well as a useful cyberhymnal, which plays you the tunes and gives biographical information as well as allowing you to copy and past the words. There are also suggestions for the different Sundays of the three lectionary years.
For a more Celtic flavour try the Iona prayers from www.iona.org.uk/wgrg/wild7.htm, or some Daily Office texts from the Northumbria Community at www.northumbriacommunity.org/PraytheOffice/index.html
Or you could just try googling ‘liturgy’ and see where it takes you.