The Online Critical Pseudepigrapha

 http://ocp.tyndale.ca/

This developing site has some 30 texts each with an introduction and critical text. Another tab has bibliography, authors, and keywords.

From the home page:

The mandate of the Online Critical Pseudepigrapha is to develop and publish electronic editions of the best critical texts of the "Old Testament" Pseudepigrapha and related literature. Note that in a few cases it has not yet been feasible to publish the best eclectic text of a given document. In other cases the OCP edition of a document does not yet include all of the textual evidence. Readers should consult the "text status" information on the introductory page for each document to determine whether a better or more complete text exists elsewhere.