Mot Avec R I O T é P A R é S O U

I use PDF SAM all the time ( ). It's an easy utility to use for splitting or merging PDFs. I use it to create an expense report PDF, for example, bringing together invoices and statements from a bunch of different sources. Other than digital signing (which, like @Nino, I haven't found in an open source viewer yet), it's the thing I do most often with PDFs.