Catholic liturgy
iBreviary (Has everything, in many languages; app available)
Universalis (English, with a Latin option, but can be converted for Kindle; app available)
Church of Ireland (Anglican)
Book of Common Prayer (A wise and rich resource)
Web resources
World Christian Community Meditation
Christian Meditation (Ireland)
New Pilgrim Path (Ireland)
Gratefulness.org
Books
Jean-Marie Gueullette OP, Petit Traité de la Prière Silencieuse (terrific overview, great advice and lots of uncommon common sense; translated by your humble servant, and given a new title: How to sit with God.
Henri Le Saux (Abhishiktananda) Prayer (simple, immensely deep, inviting; English)
Web resources
Augustinian Spirituality
Institute of Augustinian Spirituality
Works of Augustine (English)