Update: In the comments to this post Thomas Black pointed out that these books are under copyright and the original poster in Scribd may have posted them illegally. I had assumed that they were available because the publisher had placed them online. Therefore I’ve removed the links to download the books. Sorry for the inconvenience.
Thanks to a comment that Robert Jimenez left on Jeff’s blog I came across a downloadable copy of Jeremy Duff’s The Elements of New Testament Greek, 3rd ed. on Scribd. In addition to this I found a downloadable copy of Sally Johnson and Natalie Braber’s Exploring the German Language, 2nd ed. These are definitely two nice resources to have on hand.