See download for each of the pdf editor section separately.
crossplatform c++ (*nix, win*, bsd) library, open-source
Pdf edit GUI for *nix systems
qt3 based scriptable GUI, open-source
Pdf edit GUI for windows (win32) system beta
original version by Eva Peskova, qt4 based, msi installer
Pdf edit tools based on pdfedit beta
crossplatform c++ (win32/64, *nix, win*, bsd) library, open-source