Works

Dialogue with Trypho, a Jew
From the Ante-Nicene Fathers, vol. 1, American edition. In HTML, at Christian Classics Ethereal Library.
http://www.ccel.org/ccel/schaff/anf01.viii.iv.html

Dialogue with Trypho, a Jew, Chapters 1-9
The Prologue of Justin's Dialogue with Trypho, translated by Paul Vincent Spade. [PDF]
http://pvspade.com/Logic/docs/justin.pdf

Discourse to the Greeks
M. Dods translation. Some doubt whether this is by Justin. From the Ante-Nicene Fathers, vol. 1. At Christian Classics Ethereal Library.
http://www.ccel.org/ccel/schaff/anf01.viii.v.html

First Apology
From the Ante-Nicene Fathers, vol. 1, American edition. In HTML, with notes, at Christian Classics Ethereal Library.
http://www.ccel.org/ccel/schaff/anf01.viii.ii.html

Fragments of the Lost Work on the Resurrection
M. Dods translation. Some debate whether this is indeed Justin's work. In HTML, with notes, at Christian Classics Ethereal Library. From the Ante-Nicene Fathers, vol. 1, American edition.
http://ccel.org/ccel/schaff/anf01.viii.viii.html

Hortatory Address to the Greeks
M. Dods translation. There is some debate as to whether this is really by Justin. From the Ante-Nicene Fathers, vol. 1, American edition. In HTML, with notes, at Christian Classics Ethereal Library.
http://www.ccel.org/ccel/schaff/anf01.viii.vi.html

On the Sole Government of God
G. Reith translation. In HTML, with notes, at Christian Classics Ethereal Library. From the Ante-Nicene Fathers, vol. 1, American edition. Some doubt that Justin is the author of this work.
http://ccel.org/ccel/schaff/anf01.viii.vii.html

Other Fragments from the Lost Writings
A. Roberts translation. What we can piece together from what other early authors say about Justin Martyr.
http://ccel.org/ccel/schaff/anf01.viii.ix.html

The Second Apology of Justin
Table of contents allows jumping to a particular chapter. No notes.
http://www.ccel.org/ccel/schaff/anf01.viii.iii.html