Apocrypha and Pseudepigrapha of the Old Testament in English v. 1 -This is a handy reference for English translations. It is a little old, but still useful.
Apocrypha and Pseudepigrapha of the Old Testament in English v. 2

Online Critical Pseudepigrapha - This site provides an accurate text in the original language along with a critical apparatus for some. It provides good bibliography and looks useful.

Pseudepigrapha.com - Provides English texts for many different sacred writings. Not sure about the sources for them all, but they provide access nonetheless.

Old Testament Pseudepigrapha - This site maintained by UPenn is a treasure trove of links for online translations of Pseudepigrapha.