Ever since it was finished by Matthew Henry on May 13th 1710, this reference has been an invaluable tool to theology students everywhere. If you're scouring scripture, or just casually studying, this can be (and usually is, I've found) very insightful.
I've noded it in the same namespace as the Everything King James Bible for quick and easy reference between commentary and scripture, I hope you find this as useful as I have!
Old Testament
Books of Law:
Genesis ·
Exodus ·
Leviticus ·
Numbers ·
Deuteronomy
Books of History:
Joshua ·
Judges ·
Ruth ·
1 Samuel ·
2 Samuel ·
1 Kings ·
2 Kings ·
1 Chronicles ·
2 Chronicles ·
Ezra ·
Nehemiah ·
Esther
Books of Poetry:
Job ·
Psalms ·
Proverbs ·
Ecclesiastes ·
Song of Songs
Books of the Prophets:
Isaiah ·
Jeremiah ·
Lamentations ·
Ezekiel ·
Daniel ·
Hosea ·
Joel ·
Amos ·
Obadiah ·
Jonah ·
Micah ·
Nahum ·
Habakkuk ·
Zephaniah ·
Haggai ·
Zechariah ·
Malachi
New Testament
Books of the Gospel:
Matthew ·
Mark ·
Luke ·
John
Books of History:
Acts
Pauline Epistles:
Romans ·
1 Corinthians ·
2 Corinthians ·
Galatians ·
Ephesians ·
Philippians ·
Colossians ·
1 Thessalonians ·
2 Thessalonians ·
1 Timothy ·
2 Timothy ·
Titus ·
Philemon
General Epistles:
Hebrews ·
James ·
1 Peter ·
2 Peter ·
1 John ·
2 John ·
3 John ·
Jude
Apocalyptic:
Revelation
n.b. I used quite a number of perlscripts to link, parse, and node these. The text I used is public domain, scoured and corrected by hundreds of people, but there still might be typos. If so, please /msg me, and I'll fix them. | 
