Theological Commons

Princeton Seminary has digitized many (mostly older) books on theology and religion, with categories including Protestant and Catholic works, History, NT, Philosophy, Mission, and Language and Literature. The volumes range from pre-1800 to the present day, and include most European languages.

http://commons.ptsem.edu/

Old Maps Online

Old Maps Online is sort of a cartographile's equivalent of a rare book shop. It has ancient maps of place, plants, animals, etc.

http://www.oldmapsonline.org/#bbox=-110.001954,-51.984594,119.919921,71.999513&q=&datefrom=1000&dateto=2010

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.