Since some rather recent updates, the Bible software
Xiphos supports the full Roman Catholic Bible canon. As a frontend for the SWORD Project, it supports a lot of free resources. There is
other Bible software following the same standard, but not all of them support the full Bible canon.
Biblical resources you can download and use through the software:Catholic Public Domain Version
Douay-Rheims Bible, Challoner Revision
5 editions of the Vulgate
An English translation of the Catena Aurea by St. Thomas Aquinas (in the list of beta modules)
The Glossa Ordinaria
Also
general books such as the Complete Works of Josephus, the Imitation of Christ, a few books by Chesterton, The Dark Night of the Soul by St. John of the Cross, the Summa Theologica by St. Thomas Aquinas (beta), and the Dolorous Passion of Our Lord Jesus Christ.