Apocalypse of Adam - Wikipedia: A summary of this text and the Gnostic implications.
Apocryphon of John - Wikipedia: An article detailing this Gnostic text.
Gist of Gnostic Texts: Various Gnostic texts in html format.
Mandaean Gnostic Texts: Rare Mandaean Gnostic texts.
On-Line Texts Related to Biblical Study: Nag Hammadi Collection: A large collection of online texts.
The Gospel of the Egyptians -- The Nag Hammadi Library: The Gospel of the Egyptians, from The Nag Hammadi Library.
The Gospel of Thomas Collection -- The Gnostic Society Library: The Gospel of Thomas in multiple translations, along with a vast collection of material about the Thomas tradition. Includes the entire Hammadi Library, as well as a large collection of other primary Gnostic scriptures and documents.
The Hymn of the Pearl - The Acts of Thomas: Part of a library of materials dealing with Gnosis and Gnosticism, both ancient and modern.
The Judas Gospel - National Geographic Magazine: Excepts of this Gospel courtesy of National Geographic.
The Nag Hammadi Library: History and explanation of the Nag Hammadi texts.
The Thunder, Perfect Mind - Wikipedia: A poem discovered among the Gnostic manuscripts at Nag Hammadi in 1945.
Trimorphic Protennoia - Wikipedia: A Sethian Gnostic text from the New Testament apocrypha.
Zostrianos -- The Nag Hammadi Library: Zostrianos, from The Nag Hammadi Library.