Logos has today launched a set of Reformed base packages.  For those who do not use Logos products yet, I can highly commend them.  Not only do they help cut down the amount of shelf space needed for all those tomes which the rest of your family simply find annoying, they also offer amazing access to a wide variety of key sources. 

The advent of the Reformed packages makes available some standard works in a new convenient form and, in some case (e.g., Vos's Dogmatics) some works for the first time.

Here are some the most important ones in these latest products:

Some of the key resources are:
                                                 
Calvin's Commentaries (46 vols.)

Crossway Classic Commentaries (25 vols.)

Preaching the Word Commentaries (26 vols.)

Early Church Fathers Protestant Edition (37 vols.) (edited by Philip Schaff)

History of the Reformation of the Sixteenth Century (5 vols.)

History of the Reformation in Europe in the Time of Calvin (8 vols.)

Institutes of the Christian Religion (2 vols.)

Tracts and Treatises of John Calvin (8 vols.)

The Works of John Owen (24 vols.) (Includes Owen's 8 vol. commentary on Hebrews)

The Works of Charles Hodge (29 vos.)

B. B. Warfield Collection (20 vols.)

Select Works of Geerhardus Vos (14 vols.)

The only English translation of Vos' Reformed Dogmatics (5 vols.) (only available in Logos)

Louis Berkhof Collection (15 vols.)

I recently finished some work on Martin Luther.  Of course, Luther is not Reformed but my project did allow me to test the Logos edition of Luther's works in terms of its helpfulness for research purposes.  The search engines, the facility for collecting together key quotations, the capacity for having multiple works open on the screen at one time, and to cross reference them, was a real boon.  I still prefer paper on the whole, but I simply could not have done what I did on Luther without the use of this software.