recommended

I don't consult these every time, but I often dip into them for valuable perspectives.

Bibles

New English Translation of the Septuagint
This is a modern, eclectic translation of the text from the title of 4QS is taken (1 Samuel 17:4). The NT writers quote the Hebrew Bible from the Septuagint, so it's invaluable. The proofs of the second edition are freely downloadable in PDF form.
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The Dead Sea Scrolls Bible
Reconstructed from the texts available in the Qumran caves, this volume is a translation of the earliest form of the Hebrew Bible currently known. Come for the answers, stay for the questions.
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Commentaries

Berit Olam: Studies in Hebrew Narrative and Poetry
A form critical commentary series with a strong narrative focus, and which doesn't lose sight of the forest for the trees.
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Hermeneia — A Critical and Historical Commentary on the Bible
A rigorous historical-critical commentary series, comprising original English language and translated volumes.
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JPS Torah/Tanakh commentary
The absolute best in modern, Jewish, Hebrew Bible scholarship.
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The New Testament for Everyone
Anglican scholar Tom Wright provides his own translation of the NT texts, with practical commentary and study.
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Zondervan Illustrated Bible Backgrounds Commentary
Fabulously well illustrated and jam-packed with that lovely historical and social context to really make the texts come alive.
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honorable mentions:
Anchor Yale Bible
Forms of the Old Testament Literature commentary series
NIV Application Commentary
New International Commentary