Raymond Brown, The Message Deuteronomy (BST) -- Edifying.
Peter C. Craigie, The Book of Deuteronomy (NICOT) -- Served as the grammatical-historical backbone of my Deuteronomy series.
Martin Luther, Lectures on Deuteronomy -- Offers some interesting insights; Luther is always refreshing.
J. Gary Millar, Now Choose Life: Theology and Ethics Deuteronomy (NSBT) -- Very academic in outlook, but with some helpful insights as to how to bridge the text to a modern audience.
Edward J. Woods, Deuteronomy (TOTC) -- Useful, but badly organized for reference.
Telford Work, Deuteronomy-Brazo Theological Commentary -- Mildly bizarre and experimental, perhaps neo-orthodox in outlook; it was sent to me by accident by Baker books. Some edifying comments.
Christopher Wright, Deuteronomy (NIBC) -- Edifying.