Get a quality enterprise content management system.
There is a
full-blown FOSS one called Alfresco that you could try out and see how
it goes:
http://www.alfresco.com/products/networks/compare/
Thanks for your information. I will have a look at this
2) Do you know
any free PDF editor besides "PDFEdit" (which seemed fine from screenshots and
descriptions, but first tries were not successful)
Sorry, have no clue there, the usual advice about editing PDFs is to
edit the SOURCE document and regenerate the PDF. PDFs really aren't
intended to be edited - text editing even in Adobe Acrobat is tedious.
The problem here is that those PDFs are generated by scans. So in fact we are dealing with
mostly images of notation here. The main tasks here are to add/delete pages, rotate single
pages or "all uneven" etc. or crop borders for a section, selection, all etc.
and in the end save them again. I think with some scripts it should be possible to do the
decrompress/compress thing from pdf->images->pdf but still this leaves the point of
pagewise editing. I don't know for sure but I think gimp or inkscape cannot do this.
Nils