Free editor for manipulating PDF documents. GUI version + commandline
interface.
Scripting is used to a great extent in editor and almost anything can be
scripted, it is possible to create own scripts or plugins.
Target platform are operating systems of Unix type (Linux, BSD, ...), we are
using C++, XPDF, QT3 and QSA.
WWW: http://pdfedit.petricek.net/
