From the Logos site:
The Expositor’s Greek Testament ranks among the most important commentaries on the Greek text of the New Testament from the 19th century, drawing from the scholarship of twenty contributors under the editorship of William Robertson Nicoll. In addition to the Greek text, this massive reference work contains textual, literary, and grammatical commentary on nearly every Greek word in the entire New Testament. The Expositor’s Greek Testament also includes lengthy introductions to each of the books in the New Testament, surveying the literary and interpretive history, along with an introduction to the historical context of each book and an extensive bibliography.
This particular volume covers 1-2 Peter, 1-3 John, Jude, and Revelation.
The free volume actually installs as two modules–one is the Greek text for the books above, the other is a commentary on the Greek text (including full book introductions and verse-by-verse, word-by-word comments). Here’s a screen shot of what it looks like when open to 1 Peter 5:7 (click on image to enlarge):
Everything is hyperlinked and searchable, and ties in with the rest of one’s Logos library.