What's a free (even open-source?) way to edit, as in modify some text, in a textual PDF file. Preferably without having to convert it to HTML or whatever, unless such a conversion can be guaranteed to preserve the formatting, which I bet it can't.
I've Googled some, but there's a sea of stuff out there, most of which seems commercial and/or inappropriate, so I'm asking you -- don't Google on my behalf, just tell me if you know of such software.
(I do believe this is called "appealing to the LazyWeb"...)