The Acts of Pilate - Apocryphal, probably written between the late third and mid-fifth century. Alexander Walker translation of a first and second Greek form. Chapters 11-16 deal with Joseph of Arimathea, and chapter 15 in the first Greek form includes interesting baptismal i - http://www.ccel.org/ccel/schaff/anf08.vii.xii.html
The Passing of Mary - Attributed to Joseph of Arimathea, but a medieval Latin version of a fourth-century Greek work. English translation by Alexander Walker. - http://www.ccel.org/ccel/schaff/anf08.vii.xliii.html
The Narrative of Joseph - Apocryphal, purports to be by Joseph of Arimathea. From the Ante-Nicene Fathers, vol. 8, American edition. In HTML, with notes, at Christian Classics Ethereal Library. - http://www.ccel.org/ccel/schaff/anf08.vii.xxiii.i.html
Mystic Realms: Joseph of Arimathea - Quotes passages of Scripture and of noncanonical works related to Joseph of Arimathea, delves into the origin of the legend of the Grail. - http://www.lundyisleofavalon.co.uk/godsetc/joseph.htm
Britannia: Joseph of Arimathea - Explains how British monarchies claimed Joseph of Arimathea as an ancestor, and why this myth unravels. - http://britannia.com/history/biographies/joseph.html
Catholic Encyclopedia: Joseph of Arimathea - All that is known for certain of him is what is told in the canonical Gospels. - http://www.newadvent.org/cathen/08520a.htm
Joseph of Arimathea, Biblical & Legendary Accounts - Canonical, noncanonical, and legendary accounts of this mysterious figure, with an emphasis on medieval English legend. - http://www.sundayschoolcourses.com/joseph/joscont.htm