The Bhagavad Gita by Winthrop Sargent ISBN 9781438428420 - a very useful scholarly translation with a great format. One verse per page with devanagari and transliteration, a word-by-word translation, a translation of each word, and a translation of the verse.
The Bhagavad-Gita: A New Translation by Georg Feurstein ISBN 9781611800388 - very much a word-by-word translation, precise but stilted. Thankfully it is lot easier to read than Georg's Yoga Sutras. includes some nice introductory essays. Georg's introduction which is very much from the perspective of a scholarly, Western devotee would be a good read for those looking for a counterbalance to the very traditional views shared by Jigna. I don't like the format of the translation as much as I do Sargent's -- Georg has the translations of each word in the back.
The Bhagavad Gita: A New Translation and Study Guide by Nicholas Sutton ISBN 9781683837336 - A nice, readable study text. No Sanskrit text. A brief introduction, then each chapter has a short introduction, the English translation, and a longer discussion section. Introductory material includes a helpful summary of the Gitartha Samgraha (summary of the Gita and organization of it into three portions of six chapters each).
The Bhagavadgita by S. Radhakrishnan ISBN 9788172238988 - A very well-regarded translation and commentary by an Indian scholar and former President of India. A long and interesting introductory essay. Very readable format with verse-by-verse transliteration, translation, selected word translations / notes, and commentary. I feel like it strikes a good balance in terms of the amount of commentary (as opposed to, say, Edwin's commentary on the Sutras, which to my mind is often over-long). My understanding is that Radhakrishnan's commentary closely follows Sankaracarya's interpretation.
The Living Gita by Swami Satchidananda ISBN 9780932040275 - A very easy-to-read translation and commentary. No Sanskrit text, not a lot of introductory material. English translation with commentary interspersed. Aimed at the Western spiritual seeker, very conversational in tone. Satchidananda really tries to make the work accessible and relatable to the modern reader. Not my preferred approach, but a good text.
Bhagavad Gita with the commentary of Sankaracarya by Swami Gambhirananda ISBN 9788175050419 - A translation of Sankaracarya's commentary. Devanagari text of the verse, English translation of the verse, English translation of the bhasya. Dense reading, but a great reference.
Sri Ramanuja Gita Bhasya by Swami Adidevananda ISBN 9788178235189 - A translation of Ramanuja's commentary. Devanagari and English translation of both the verses and the bhasya. Ramanuja's commentary is not as dense as Sankaracarya's. I'm looking forward to digging into this one.
Mahabharata Book Six Volume One: Bhishma Including the "Bhagavad Gita" in Context by Alex Cherniak ISBN 9780814716960 - An interesting volume from the Clay Sanskrit Library. Includes not only the Bhagavad Gita, but the first 64 chapters of the Bhishma Parva, through day 4 of the war. The Bhagavad Gita is chapters 25-42. Left page transliteration (they have their own conventions for this), right page English translation. It is fun to have more of the surrounding text.
The Bhagavad-Gita: Krishna's Counsel in Time of War by Barbara Stoler Miller ISBN 9780553213652 - A slim volume with English translation only. Relatively brief introduction and afterword. I think (like her Yoga Sutras translation) it suffers a bit for her choice to translate every word (e.g., yoga) into English and always translating into the same English word, but it is also a very crisp and well thought-out translation.
Bhagavad Gita: A New Translation by Stephen Mitchell ISBN 9780609810347 - Another English-only translation. This is a translation Patricia is fond of. I am a big Stephen Mitchell fan, and this is a lyrical and very readable translation.
The Bhagavad-Gita by R. C. Zaehner ISBN 9780195016666 - an academic and literal translation with transliteration, English translation, and notes/commentary. The commentary is more clarification than interpretation, and sometimes brings in insights from the commentators. Not an easy-reading volume, but there is good stuff there.
The Bhagavad Gita (2 Vols. in One) by Franklin Edgerton - An older academic translation, transliteration and English translation on facing pages. Includes a number of essays. One of the things this volume is most appreciated for is its inclusion of "The Song Celestial," Sir Edwin Arnold's verse translation. Far from a word-for-word translation, Arnold's translation is cited by many as an English translation that captures something of the rhythm and beauty of the Sanskrit original.
The Yoga of the Bhagavad Gita by Sri Krishna Prem ISBN 9781596750241 - Commentary only, no translation. Aimed at the spiritual seeker, with an East-West mindset. A very nice elucidation of the text. More useful for understanding a chapter than a verse, but he does go through the chapters linearly and includes notes in the margin as to which verse(s) each paragraph pertains to.
From Mind to Super-Mind by Rohit Mehta ISBN 9788120809659 - Commentary including translation of selected verses. So far I am not nearly as sold on this book as I am on Rohit's commentary on the Yoga Sutras. Maybe my first impression will turn out to be wrong.