Prospero is a mostly-gone-but-not-forgotten ILL/DD toolkit that ran into, um, *ahem* problems with its 2.0 release. If you sift through the history of posts here about Prospero, you'll find more details about how it evolved, but not a copy of the software. Attached to this post is a copy of the 1.40 release, for the completist library hacker in your ilfe.