The Liturgy of the Hours (or Divine Office) is a treasure of the Church, and one of the official prayers for the Church as a community. The primary prayer of the Church is, of course, the Mass.
These online resources are recommended by Dr. Marcellino D'Ambrosio (www.dritaly.com); see his website for many other Catholic resources.
Liturgy of the Hours Apostolate (www.liturgyhours.org)
This website offers daily Liturgy of the Hours Night Prayer in various languages. The prayers are offered in Adobe Acrobat formats that print as booklets, display on PCs and mobile devices, and 'Read Out Loud' on PCs.
This website provides many formats of the day's Liturgy of the Hours: webpage, RSS feeds, automatic email, and WAP (webpage-lite to read on your mobile phone).