Breviary – Liturgia Horarum
Richard Královič
iBreviary
Paolo Padrini
Laudate
Aycka Soft
Catholic Calendar: Universalis
Universalis Publishing
Divine Office
Divine Office, Catholic Ministry
Catholic Mass Times
Pablo Licheri
iMass
Anchoright Productions
Hallow: Prayer & Meditation
Hallow, Inc.
Amen: Catholic Bible & Prayers
The Augustine Institute
Verbum 天主教圣经研究
Faithlife